Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76ed8839abdb37f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 13:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4868e13263b6a87c5c52f9b5b2f53ea9 SHA-1: db9ccc30f8a076a658842b73089786d4949f6a52 SHA-256: d76ed8839abdb37fd83e8271663a17bc71fe1b36198286aea42ea52fe9638a6f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to benign Shopify domains, but crucially includes a link to the malicious redirector traff.cc. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack chain. The presence of numerous external PDF links suggests a tactic to increase search engine visibility for malicious content or to distribute malware through a link farm.

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=basic+application+of+computer+pdf In PDF document text
    • http://files.justneighborsvt.org/uploads/1/3/0/8/130874554/nalukinojosera.pdfIn PDF document text
    • http://files.leapinlizardsdaycares.com/uploads/1/3/1/3/131383791/4b552d70.pdfIn PDF document text
    • http://files.bamachutes.com/uploads/1/3/1/4/131453605/ledonon.pdfIn PDF document text
    • http://files.berkeleyellis.org/uploads/1/3/1/4/131437312/toradume.pdfIn PDF document text
    • http://files.gracecatcollective.com/uploads/1/3/1/4/131437605/b73f2e8d7c.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/1/0435/9749/6477/files/sejarah_kemerdekaan_amerika_serikat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/jerelatezavafuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/sweepstakes_audit_bureau.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/dumobugiwamuritenabaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/79288618312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/jajasipagetaxopuniguxudib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/29739996187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/42873032618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/kewipimom.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 6

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_off000067ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FF 5348 bytes
SHA-256: ee255b2042fa803f6c45a4ba6e81963f2729ee5c947bfed004c8b7ba85770552
font_01_sfnt_off00007a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A16 10004 bytes
SHA-256: 6a64ee451270ddb83447539d0b8aa9977632caa90dc8281d716892f7b273dcc1

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