Malicious PDF — malware analysis report

Static analysis result for SHA-256 decab4b9f53d4489…

MALICIOUS

PDF

37.8 KB Created: 2020-08-19 13:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c90096b5bda7d9f5f75e8dbd93650f90 SHA-1: 71cf8059b8f14be232fb5b5e5e87941c95959d78 SHA-256: decab4b9f53d44897d24ae391a27345d6a0b48fb6336c7affd34e0827d9a7c2c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to this redirector. The PDF also contains a mass external PDF link farm, with many links pointing to benign Shopify URLs, likely as a camouflage. The primary malicious URL is https://ttraff.com/pify?keyword=reduce+pdf+file+size+acrobat+xi+pro, which is designed to redirect the user to further malicious content.

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=reduce+pdf+file+size+acrobat+xi+pro In PDF document text
    • http://files.womenwritersweb.org/uploads/1/3/1/0/131069950/928d65af.pdfIn PDF document text
    • http://files.lordbassenterprise.com/uploads/1/3/1/4/131482950/6d53b08.pdfIn PDF document text
    • http://gesobimuk.thegardensatsancarlos.com/uploads/1/3/1/6/131636648/rekivuworogizezake.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/1/0436/4717/2768/files/91907222778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/ginufofinavuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/44047312178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0994/8322/files/cover_letter_for_bank_job.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/financial_mathematics_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/exercise_present_simple_continuous.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/rewewir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/jojazalebifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/76368654346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatajimawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/fevakonibujaxupenipa.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_off000055c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C4 5412 bytes
SHA-256: b0c60aa5d9164811c632931a305284f3a16aae77bcdcb5f5b80650e649707593
font_01_sfnt_off00006844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6844 10048 bytes
SHA-256: fdb162e9d598d10a5b2e388a1579f392387ca84fc14cf6d24942798a90ed114f

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