Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16bb717a303d352…

MALICIOUS

PDF

58.4 KB Created: 2020-08-11 16:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b674747f1da06b6f9d81530c364627a SHA-1: 2cd090712f34880a0a110000ef6d9cc066deb2ad SHA-256: a16bb717a303d35223ebd31ee349b54f75fab2b52d8a54e94bbb5b771bbfe059
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to benign-looking documents hosted on Shopify. However, one critical heuristic firing indicates a link to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=teoria+da+argumenta%25C3%25A7%25C3%25A3o+jur%25C3%25ADdica+pdf In PDF document text
    • http://files.madebyiv.com/uploads/1/3/0/8/130874009/safamugesol-sipalukomafeg-wogemuw.pdfIn PDF document text
    • http://files.enriquemanchon.com/uploads/1/3/2/3/132302960/1822826.pdfIn PDF document text
    • http://rekatare.mayadayal.com/uploads/1/3/1/0/131070493/b9a9192.pdfIn PDF document text
    • http://files.activealuminium.com/uploads/1/3/0/7/130739084/miguxot-fegelofup.pdfIn PDF document text
    • http://fasixudi.tastefulvoyages.com/uploads/1/3/0/9/130968921/rekefapebel_folivejarikomoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/revista_chasqui.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8557/6857/files/journal_of_apicultural_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/dogofutufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/creative_director_job_description.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/first_500_digits_of_pi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3110/1603/files/calculus_problems_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/73429285691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/22038376514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/causality_assessment_of_adr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/patufidigox.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C6 5844 bytes
SHA-256: c8b59f76cebd0db61547d640ae04ddbe1101a21b87a449ac7fa1ae089cf281ac
font_01_sfnt_off0000b4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C5 12760 bytes
SHA-256: eaf9642591e3d6bd5930fe6659e51bdee522bb3b587e3c0e83b272ce67baf216

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