Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c6aa6890127780…

MALICIOUS

PDF

42.3 KB Created: 2020-08-02 12:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da10a57add3e8d7acb6a367e9c1d9026 SHA-1: e132b117f5d18ab475efdf1de609da163451d1cd SHA-256: 81c6aa68901277800d158fea0c710bf98c30c312626695c23340b58880426bbc
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing lure. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=morel+mushrooms+wisconsin, which is identified as a malicious redirector. This indicates the document's primary purpose is to redirect users to potentially harmful content.

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.cc/pify?keyword=morel+mushrooms+wisconsin In PDF document text
    • http://files.flexosupply.com/uploads/1/3/1/3/131380029/fipijinu.pdfIn PDF document text
    • http://files.penncrestlions.com/uploads/1/3/1/4/131454106/7272726.pdfIn PDF document text
    • http://files.focusonthegood.com/uploads/1/3/0/7/130738769/jeluzulatawola-teluzinowuked-nikemogozexe.pdfIn PDF document text
    • http://files.westernlogcreations.com/uploads/1/3/2/3/132303083/nigodujirusibunasiju.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/1/0429/1143/2867/files/gugejewevapuxax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8211/9323/files/argumentative_essay_rubric_high_school_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2171/2034/files/demederak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/pumikutuwum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5813/files/8425917201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/68946505744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/51917319775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/93117638004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/jewiwipapixolidomitafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/regepolisijezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2785/5522/files/51285765788.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_off00006718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6718 4924 bytes
SHA-256: 2987e6e9147c5738010195b74fd92143c49678053eafd449b17663b8d49d8cb0
font_01_sfnt_off000077ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 10356 bytes
SHA-256: d8caf30b2a992df84c268f2c5e849ec6b3a0bdb3551f0c1dbfdd94ffa69abe3e

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