Malicious PDF — malware analysis report

Static analysis result for SHA-256 869eab81e1cf69c3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-26 08:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d48eaee9ffd2392f0f5825fbdf244ff SHA-1: 57c4a6975108cea897efc7980ef3c5693877fe77 SHA-256: 869eab81e1cf69c3168e6606b04ec619c50c2a1f338f08b478f9874cfe13be3c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but the primary malicious URL is a redirector designed to lead users to potentially harmful content. The document body, though partially corrupted, suggests a lure related to a tractor service manual, likely for SEO poisoning purposes. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms a high likelihood of user-directed compromise.

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=ford+5600+tractor+service+manual+fre
    • http://potituwaw.oceanspartansfootball.com/uploads/1/3/1/4/131406361/1813536.pdf
    • http://files.miketaylorphotoarts.com/uploads/1/3/0/7/130775647/felabutujakufe.pdf
    • http://files.neekascreationsonline.com/uploads/1/3/1/3/131381640/zilaja.pdf
    • http://files.dinas-decor.com/uploads/1/3/0/7/130775310/ec5c7.pdf
    • http://files.templemea.com/uploads/1/3/1/4/131407214/muxizitaro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/fermin_abelardo_castillo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7572/3673/files/vozisosusamafidoboze.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/zowarekurofizafuxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1218/6531/files/77653149891.pdf
    • https://cdn.shopify.com/s/files/1/0433/8008/0801/files/hollywood_creative_directory.pdf
    • https://cdn.shopify.com/s/files/1/0463/1022/8128/files/buxuzipoponijaxotavawupak.pdf
    • https://cdn.shopify.com/s/files/1/0434/1363/5226/files/calendario_vacinao_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/78584195009.pdf
    • https://cdn.shopify.com/s/files/1/0437/0448/3993/files/15898887136.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/pdf_anesthesia_machine.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e6.bin
ac1b0a455d567fea534be3d594f8bbf825212ba6dcc358b413707239008719fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E6 5604 bytes
font_01_sfnt_off000075e8.bin
d7dc543a933ddaeec3f1a9ff5b9f91efc57b27be072d202e1b8eb43c60a46b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 13048 bytes

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