Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cbfea9ced0785e…

MALICIOUS

PDF

39.6 KB Created: 2020-08-09 23:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ff8608415fe50fdcae49c1799e3a450 SHA-1: c82620817534e6c1817548dadfd0ecd81f280a2a SHA-256: 85cbfea9ced0785e902ba35cbe453cd38a5a03988da0b5f2784d6ee5f947ce1b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body and heuristics suggest a lure for free downloads, likely to distribute malware or phish for credentials. The presence of a link farm and redirector indicates a malicious intent to drive traffic to potentially harmful sites.

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.com/pify?keyword=new+headway+beginner+4th+edition+pdf In PDF document text
    • http://files.flatspokecycles.com/uploads/1/3/1/4/131408529/6549756.pdfIn PDF document text
    • http://files.d-hunt.com/uploads/1/3/1/0/131070469/4325607.pdfIn PDF document text
    • http://files.uprisingstarsinc.org/uploads/1/3/1/3/131379045/gowofikur.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/1/0440/9255/5416/files/rolutuxima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/chimie_anorganica_clasa_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/kuvovulasib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/apostolic_anointing_spiritual_warfare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7412/4950/files/todijakazilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3656/3866/files/contemporary_financial_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/45100346338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/13122932078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/farivedizunidijuwolepowiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2276/8535/files/linear_equations_with_variables_on_both_sides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/aadhar_card_form_assam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6857/8210/files/6643747530.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 8

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_off00005aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEE 5484 bytes
SHA-256: 32f3d38a0348102072ddff3258b59cfca99fbbbd0b821afd0b604b25bd000fbe
font_01_sfnt_off00006dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC0 10532 bytes
SHA-256: 409384094c1503a7060257d7fd5755556150ddb04121b7fa2bec8d390196c6fb

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