Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9fc348b3d389ec…

MALICIOUS

PDF

40.4 KB Created: 2020-08-26 22:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed30f3ee551c89abbc859dd98170b211 SHA-1: 99f265a409d58fdd9f58bf03a75245ba97760d64 SHA-256: 0d9fc348b3d389ec4e2647da3ea8a77819bf2c055f469134f81698f12ceeff3d
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious infrastructure. The ML classifier also strongly indicated maliciousness, supporting the conclusion that the document is intended to lead users to harmful content.

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=2002+buick+century+repair+manual+pdf
    • http://files.parkcitybrewery.com/uploads/1/3/0/8/130815213/megupirawised-kumifoturodose-tosumomesajug-sufote.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0451/1108/3160/files/watch_batman_v_superman_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3411/files/the_abominations_of_yondo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/90266616653.pdf
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/17728281525.pdf
    • https://cdn.shopify.com/s/files/1/0433/4724/7263/files/swayamvara_parvathi_mantra.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0433/6677/6991/files/business_card_template_word_document.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/english_to_urdu_dictionary_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/sotolajuxajise.pdf
    • https://cdn.shopify.com/s/files/1/0438/5308/6885/files/40541439497.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/gogudotune.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_off00005e6e.bin
e6bd17aba0d25a16f19e5ba095923d44f662cb919e73af32a9e490581184bfff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6E 5608 bytes
font_01_sfnt_off00007165.bin
486950887e2438c07f71d8a199172556fb487bf4cf1459e746dca1661a4ac162
pdf-font-stream PDF embedded font (sfnt) at offset 0x7165 10328 bytes