Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbdf507218baf5a…

MALICIOUS

PDF

122.5 KB Created: 2020-09-16 07:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2751dd34cff4711a0075694bf63c6e1f SHA-1: 80d672f3cf13ea357a3fa75c93187bea1ca7a646 SHA-256: 9fbdf507218baf5a58fed5d22e0dfd28b8f8ec4f04df6a4b80ffd3331835fe52
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/pify?keyword=gothic+symbols+copy+and+paste In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://static.usrfiles.com/ugd/10a4aa_80608da4936e48a69ba731da2697bc50.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/54fa57_0fa167b039674e5c8ae2584e16749832.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f3cb45_54c4d0b47a1f4f5ba5f7bfffd307a5a0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b5973a_ea8094692b3a4c0e806a038765da2b1a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/32acb1_342708b1f1b4484b932d7f3d3535b5d6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9c43ec_c86b486415cf41d3adbde3fbb9aad2f6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/296484_847df4b3aa8e4b63b8999fab31d2b0fc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/debdc1_6ea8081fbd754824888f7597e8df2cb7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/vezanuraxepoxaxajazum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/poultry_layers_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/6176908846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92588710477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/dufomupenumuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/81967926444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9802/0767/files/20784639106.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 12

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b75f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB75F 2744 bytes
SHA-256: c0cce3c92255aba3bbf7641214640a7c8589a7db9725aabb06bc87338d989da9
font_00_sfnt_off0000830b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830B 7068 bytes
SHA-256: 918b940867cc4769c12d47c8f59a6a92ed94c038c5c1ed2209b77d4bbfedfa89
font_01_sfnt_off000094f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F6 4492 bytes
SHA-256: 308ee9408387794fa420c97795f0cca6cf790d631a5b938928115316fb3f3d31
font_02_sfnt_off0000a4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D8 5492 bytes
SHA-256: 2d964c0086195faae39c438a4a77172cfb7931d6bfb0e646560bced69997eb9e
font_04_sfnt_off0000c26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26E 6616 bytes
SHA-256: f358dd5fb58072b7bf52ca8ff1c477d2aaf556c83be716c4e755bdc2198c08f9
font_05_sfnt_off0000d2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E8 8736 bytes
SHA-256: e552c2f692129223ecad751063b8085cb3ed49d91161b6693aa1090ec4d07aaa
font_06_sfnt_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 2684 bytes
SHA-256: 2c5466cbb1bbf4642982cd80e4055ca47e1c996f9246594d1ef5b83addd20f73
font_07_sfnt_off0000ee02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 5852 bytes
SHA-256: e197c3daed01507d2166f9aa476220777787e91ae28780e40f08fcf4deb9861b
font_08_sfnt_off0000fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 3600 bytes
SHA-256: 00d2519ef66301632193050d450e20c1f8d429e5d919b90ae663d0f4c994088f
font_09_sfnt_off00010b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5E 20364 bytes
SHA-256: e6af7f278b0cb15e9b7f05e9f8581f33baaeb6e98dc8c373dc2d73df12a0c02e
font_10_sfnt_off000147be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147BE 59560 bytes
SHA-256: f025ed112ec79530530a4d4c54496b7cb6d1b1a170c811f2d875d6a58c5773dd
font_11_sfnt_off0001cf9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF9C 2004 bytes
SHA-256: 2ae1a1a33eaed49c7dedfbf7cbddbd5ab9571ccf5f894f8022fef21b475f8a76

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