Malicious PDF — malware analysis report

Static analysis result for SHA-256 7320fefa6db3cc89…

MALICIOUS

PDF

32.0 KB Created: 2020-09-07 18:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4fa93f731b5e9b530a585c83ec93c70 SHA-1: 7317542b26c2047ed4c269514270017621ac7eff SHA-256: 7320fefa6db3cc893286704f0cc0f42348526ee7ec4bd095a255d5afcfb384c7
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, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is likely the primary malicious objective. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports a phishing or redirection attack pattern.

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=pearl+harbor+soundtrack+piano+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5426/0633/files/employment_news_this_week_odisha.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/somajuzukogitewepuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/nupekaroxusatoguluzof.pdf
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/83901692562.pdf
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/92260568980.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/30747319774.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/784133187.pdf
    • https://cdn.shopify.com/s/files/1/0465/9121/3733/files/jexeja.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/vumukakokuwuzawefor.pdf
    • https://cdn.shopify.com/s/files/1/0434/1743/6312/files/best_bodybuilding_workout_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/xuligikomikigorex.pdf
    • https://cdn.shopify.com/s/files/1/0462/6389/4173/files/65726211586.pdf
    • https://cdn.shopify.com/s/files/1/0430/5341/6601/files/kovomuvezefidurodazame.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/gadurene.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/pugumijifiweluv.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_off00004210.bin
46b0c613ac6327396219798a2474bda21a729ba8ab6722b1cc641559cd347fb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4210 5516 bytes
font_01_sfnt_off00005499.bin
648ba8666a9daae476cd71d708e1707bed67bf4efe84c96beb9f74dcae96e46a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5499 8924 bytes