Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4d01dfc4b46d15…

MALICIOUS

PDF

58.5 KB Created: 2020-09-09 05:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f6fe8efbc593147c0cce7756e46a521b SHA-1: 6792a1917c0b45dc1a5835fdc1c8bcdeeadfe37c SHA-256: fd4d01dfc4b46d15daad991df9ba65e76c226cdbe377c58cc6656a03979e9876
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm designed to mimic search results, with a primary link pointing to a known malicious redirector. This suggests an attempt to trick users into visiting a malicious site, likely 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.link/pify?keyword=draadloze+achteruitrijcamera+android In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/0ebc1f_975884b3c12049779090867173b06703.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b47706_b171ebcbabf440058cad752dd317fe7d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01e791_4acd4c18d1df448c922591e0bd878878.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8127dd_3a3dbac1b69d4e71b134ab41e6923341.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/38bf1f_0d4a0eb6b4334ccc99000bf66613773c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/64d889_d207e861ab0f43c98ccf04e3d1966968.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1715bf_3bff96e99e08409295a0283b0455c140.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8c7d07_bda34577b2434d619abe0fa4bb83a121.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e78b77_af31b9e79ae645d181976d3c1e32270f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7831/0306/files/mikezonapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/22155499419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/addis_ababa_city_road_authority_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/oracle_number_format_2_decimal_places.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e5d97_a6d8ffb11cee42768188cb100599110c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/80bfa9_9cf7bd7ae77c4e24be71f2c9447d3f5e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e23fbb_f09902efbafd4474bb206b1c0dcfb4e2.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E3 5124 bytes
SHA-256: 22f7afc66458bd229b9c6a72748f47c793da85e3bc2dbecdc7105f3a3af46832
font_01_sfnt_off0000b835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB835 10980 bytes
SHA-256: 260b02db2c1eba09e3aea2064103db3af15214fc2fc6faa2123a6d4fd5911237

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