Malicious PDF — malware analysis report

Static analysis result for SHA-256 a431397e23934cf5…

MALICIOUS

PDF

37.9 KB Created: 2020-08-11 02:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e7a24fcd3835fee9a003efcc9a06ca5 SHA-1: cea79a9ba18bf6d9d50b8d6ad209ba9fb01ddc26 SHA-256: a431397e23934cf5e261b0a693163b6a6460cb9f5c1d1ec703d1ca70042fd66d
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The document body itself appears to be obfuscated or corrupted, but the presence of numerous links, including one to a malicious redirector, strongly suggests a link farm or phishing attempt designed to lure users to malicious sites.

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=an+introduction+to+statistical+methods+and+data+analysis+6th+pdf In PDF document text
    • http://files.sunnysidehomedecor.com/uploads/1/3/1/4/131453198/tubuzowemozonegogol.pdfIn PDF document text
    • http://files.lasertoenailsanfrancisco.com/uploads/1/3/1/4/131453843/xivixikoso-sojutugerefubi.pdfIn PDF document text
    • http://tejikuni.bizfxmedia.com/uploads/1/3/1/3/131379206/9747839.pdfIn PDF document text
    • http://gunaduti.umcreationcaresummit.org/uploads/1/3/1/6/131606490/lokunigaxonade.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/1/0434/1222/6200/files/interventional_cardiology_board_review_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/zuvemafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/sumujof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/axis_bank_nre_fd_rates_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/jivewixoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/anaphore_et_cataphore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/60871490098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/nsfas_application_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1872/2207/files/roxeravedoniwof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/43413473786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9977/4366/files/13666650250.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 7

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_off000055d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55D5 5640 bytes
SHA-256: ce1ff7b1457965e31f1fb09d064a3ad84f11ce02e7045e15c37fca5e2f04d06d
font_01_sfnt_off000068df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DF 9712 bytes
SHA-256: 79675d3af5fe72153ff389f7a298411e44ab2d478968346bc53267cdc35def39

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