Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a325f71d8f9f831…

MALICIOUS

PDF

38.5 KB Created: 2020-08-11 13:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 47fef58fad2416c339ef32b2c2eb9205 SHA-1: 86d5b3313574d9546ea02e6c62240e0a9401a3f0 SHA-256: 5a325f71d8f9f831b1a9e1ca886dc30d75e9865aada8a8439f69bb824fd27fb2
194 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector service (ttraff.com) disguised as educational material. The ML classifier strongly indicates maliciousness, and the presence of numerous links to external PDFs suggests a link farm or SEO abuse tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

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/wb?keyword=reading%20and%20writing%20decimals%20to%20the%20thousandths%20place%20worksheet In PDF document text
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.pdfIn PDF document text
    • http://wumifez.janebissellwriting.com/uploads/1/3/1/3/131382133/logonu_vufozurewo_pajanuvemo_dopurukuvovu.pdfIn PDF document text
    • http://files.fabiogrillo.com/uploads/1/3/0/7/130775921/pamibejuruvovozokaf.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/1/0428/7581/4047/files/xosekunejopulusazap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/xakorigapopad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/85527521802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/nuzaxukosagug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/difumodojiberapuzos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/rumuwozuvojidezukadisavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/55308092131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/gejotifeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/23854319351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/75396031763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4211/0625/files/numokimuv.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_off000059b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B3 5652 bytes
SHA-256: ae47d1f0a99e6106b77343447b7ffe67c58cfdac0f922495406ce5d4c328d0a2
font_01_sfnt_off00006cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD6 9244 bytes
SHA-256: 069185c06a136ca4e334cb29e5acda3baed0c31e13a137e9704df28d9941819b

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