Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4211d968722e986…

MALICIOUS

PDF

38.5 KB Created: 2020-08-07 05:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5e6e78db030920c08678659de357cf7 SHA-1: 844ce6a12213500d46c35e640dbf779a118ee0a6 SHA-256: c4211d968722e98606a93640e0b526b14e7b1538bf80ac1a8e987d880eef4837
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=sports+biomechanics+textbook+pdf', which is likely the primary lure. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm used for SEO poisoning or to obscure the final malicious destination.

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=sports+biomechanics+textbook+pdf In PDF document text
    • http://files.appassionare.com/uploads/1/3/0/8/130814397/81c5c0b54df.pdfIn PDF document text
    • http://files.teamriskys.com/uploads/1/3/2/7/132712451/rubolefenakotunuk.pdfIn PDF document text
    • http://files.thedragonshoard.net/uploads/1/3/2/3/132303270/laxikuzemusi.pdfIn PDF document text
    • http://files.sissonvillechurchofchrist.org/uploads/1/3/1/4/131438282/tofukawepizalavudawa.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/1/0430/2720/2205/files/business_english_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/jowotezelorunemel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/free_online_mahjong_connect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/4458750194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/78308540802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/mutuzinififibeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/cholcystite_chronique_lithiasique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/ielts_general_speaking_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/feperopefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/solving_multi_step_equations_with_fractions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/tonopepulaba.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_off0000585c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x585C 5740 bytes
SHA-256: dd7bc359e5e985d0a801ad55cdc2364a1f3dd6cb3d61a15da954a919e602866b
font_01_sfnt_off00006bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB3 10008 bytes
SHA-256: 5eb6583bf2efb304035e2b6b619037646aaba3de84b1e55fdbeea70caad18a5d

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