Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3f4b5d626d5e84…

MALICIOUS

PDF

37.1 KB Created: 2020-08-10 11:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8982e36549caf4d63fb742b90bbbdd80 SHA-1: 0510a0850dd3503a66eab76529c332bf15c3a948 SHA-256: 3d3f4b5d626d5e84150e93455ee16e468c04991c3c5f5662c4e13eef6c3298bb
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.ru, which is likely part of a link farm designed to deceive users. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for "Robbins pathology mcqs pdf". The presence of numerous external PDF links further supports the link farm heuristic.

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=robbins+pathology+mcqs+pdf In PDF document text
    • http://files.cougarstrongracing.com/uploads/1/3/1/3/131378990/rakotaziwogatavo.pdfIn PDF document text
    • http://telad.lifechangersim.com/uploads/1/3/1/3/131383657/fawojafejawij.pdfIn PDF document text
    • http://files.acupuncture4yourhealth.com/uploads/1/3/2/8/132814343/6809803.pdfIn PDF document text
    • http://files.mrsferrell.com/uploads/1/3/0/8/130874154/fonizedoperuzodox.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/1/0431/4916/4705/files/lunetamugerarisujup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/62544450052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/51756849748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/62890695939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/36416582694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/momeratagafelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0826/1287/files/10588873865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/pujunuwosiruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/budget_planner_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9141/1615/files/memorandum_for_record_army_example_wlc.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_off00005181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5181 5848 bytes
SHA-256: 4229e25f70ddef6cb625ccf9dcc81d7522171ec2d765d7e55c3ec36e8a2fa5e6
font_01_sfnt_off0000654d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654D 10084 bytes
SHA-256: b1ea305cdae6b9b3cba9fd164f2571b2babb5cfe7ba6f37f1fe7484cd75853d8

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