Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b9800be9875391…

MALICIOUS

PDF

73.5 KB Created: 2020-07-29 10:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1ec0c8f9f0de500184d7de4c1063141 SHA-1: 50f67c933e0f174d035ad86e80a4577b7276d4f7 SHA-256: 68b9800be9875391eb99d5eeae0630a85034805cc39f5d2fec2187deb9a20a73
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. This suggests the document's primary purpose is to direct users to potentially harmful websites, possibly for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=bereketli+topraklar+%25C3%25BCzerinde+kitap+pdf
    • http://files.cherylcanterbury.com/uploads/1/3/2/6/132683087/fapataw-letitumobulek.pdf
    • http://files.fmemc.org/uploads/1/3/2/6/132681359/figedu_kaxekozu_monilogulab_bixiduda.pdf
    • http://files.aperfectinjustice.org/uploads/1/3/1/4/131438071/gibavadili_rugolunes_nujagogizi_fusupiwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/96971121214.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6777/files/fabubu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1557/5464/files/wiwawela.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14490041284.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/benala.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/rinurof.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/26920626603.pdf
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/kigasus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/59023515781.pdf
    • https://cdn.shopify.com/s/files/1/0431/7295/4269/files/4563472777.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfe6.bin
3a84879d38cbc4391a31f59040d6566f8c2735bb10a46569c39dd73aaab2b3b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE6 4928 bytes
font_01_sfnt_off0000d0b3.bin
23e8663a04537cf7c5777c7f3f1cddb97d1c2c948ab12844add0f362d3082a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 1936 bytes
font_02_sfnt_off0000d9eb.bin
4ffada049bec82416b49cc55d087475af9295fbf5965561696d1bf27649ca1dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 12432 bytes
font_03_sfnt_off0001006a.bin
64f21e55c2f29c6f605e8f9fd96e7f7b34f9b4a26fdc717ddead948457370e3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 16148 bytes

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