Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cda8d73fe118dc4…

MALICIOUS

PDF

57.2 KB Created: 2020-08-12 01:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d497836241dbfa17546c686872ef20f0 SHA-1: b176a4ac69fb3260d9d9ce0e0862d564a00d080d SHA-256: 0cda8d73fe118dc42f148039a11ebe5ebebf426b56d84d8c087b78975b8d321f
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as a link farm for PDF documents, but they ultimately redirect to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is part of a phishing or scam campaign. The embedded URL https://ttraff.ru/pify?keyword=introduction+cluster+computing+pdf is identified as a malicious redirector.

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=introduction+cluster+computing+pdf In PDF document text
    • http://pokiru.kathrynyarbrough.org/uploads/1/3/0/7/130739777/govot_gameruba.pdfIn PDF document text
    • http://files.sfsailing.org/uploads/1/3/2/6/132695915/vurobazavarew_redipumuwope_todamorifujonil_davanonawufig.pdfIn PDF document text
    • http://kanixop.megaplot.org/uploads/1/3/1/6/131606490/tavuzizutewelani.pdfIn PDF document text
    • http://lofit.jewellerybyjody.com/uploads/1/3/1/4/131452938/zunugewofamu-jevavi-padid-fifusin.pdfIn PDF document text
    • http://files.theequinelink.net/uploads/1/3/1/3/131384721/3302223.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/1/0432/2990/5058/files/sipubumapenugemudegel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/nikal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/kugimoxupeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2951/0814/files/josijan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1411/0880/files/ankylosing_spondylitis_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7097/5128/files/animal_cell_culture_and_technology_butler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/fivojitobumare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1459/2408/files/jekedonebogijalugoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/21848522869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/tv_guide_boise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/66792488390.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_off0000a2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D4 5200 bytes
SHA-256: 5bdb8b6c5e423d96307c9675b6ca785028fd396a2adc2dda8af373db8c2bd091
font_01_sfnt_off0000b472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB472 10340 bytes
SHA-256: 58abbacfd88355f31b466e59652d03009bfc20787b7d90283b6891ca8aba074d

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