Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d115870c3c6879…

MALICIOUS

PDF

47.0 KB Created: 2020-08-27 20:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: be6db4083964f7a06fbd2d11ccc2b67d SHA-1: bf9da3a70dfa98658d7d5eabdd852d7f6b981a06 SHA-256: 81d115870c3c6879e9d2f83f5b95a79a2c9bc4cc110d9e0d4aa047158f151ebc
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF filename, suggesting a lure for users interested in financial topics. The presence of embedded URLs and the ML classifier strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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=deferred+tax+assets+and+liabilities+on+the+balance+sheet In PDF document text
    • http://files.learningladderduxburyvt.net/uploads/1/3/1/4/131406688/nugozafopa_bobowo_simexosat.pdfIn PDF document text
    • http://koduvo.shellysrockshop.com/uploads/1/3/1/3/131378780/ruvavazovit-luvudava-nevame-pawutijofi.pdfIn PDF document text
    • http://files.maryjanecampbell.com/uploads/1/3/2/6/132695465/e4574974.pdfIn PDF document text
    • http://files.lakeworthanimalclinic.net/uploads/1/3/1/3/131397940/2829451.pdfIn PDF document text
    • http://files.bryanbotterill.com/uploads/1/3/1/8/131856415/dfd00.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/1/0431/7279/0427/files/ip_address_on_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/poxusulijupidokubeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/tv_guide_for_tonight_nsw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/aquaponics_commercial_system_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/86687757075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1218/4469/files/fluoroscopic_guided_lumbar_puncture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/jalorofujezegizominifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/seismic_isolation_devices_report.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_off00006e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9C 5316 bytes
SHA-256: 3cb72adcec5082d63505a98a3cd5070f53c8aa0d2ba0d392ebded0a23e04bdf9
font_01_sfnt_off000080aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AA 14824 bytes
SHA-256: 16d4de34c0ed97a7d01ed0bee567d9309c54f512ca8fef196ccf7eb9bcbd059e

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