Malicious PDF — malware analysis report

Static analysis result for SHA-256 828877e4131ecb1b…

MALICIOUS

PDF

44.2 KB Created: 2020-08-02 13:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 745d1b849175a4ccfd359f8231dc82a5 SHA-1: f18b5226b67ece63b4da1d2028dc2204247240a3 SHA-256: 828877e4131ecb1bd180de4eb41264daf3dcdae170580390e773ec7c6e9916d0
194 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to redirector infrastructure. The primary redirector URL, https://ttraff.ru/pify?keyword=itaste+vv+manual, is flagged as malicious and likely serves as a lure for phishing or malware distribution. The document body, though heavily obfuscated, contains references to the redirector and other benign-looking PDF links, suggesting a coordinated effort to obscure the malicious destination. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=itaste+vv+manual In PDF document text
    • http://files.bzeyuc.com/uploads/1/3/1/4/131453060/gojutixugo.pdfIn PDF document text
    • http://files.meistertrees.com/uploads/1/3/1/4/131407152/wowakerozogos.pdfIn PDF document text
    • http://files.rendokai.co.uk/uploads/1/3/1/4/131453967/dadadolekorejin.pdfIn PDF document text
    • http://files.amfcontractinginc.com/uploads/1/3/0/8/130874254/pejabojibirawa_vesawozaluze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/luzewinotebijitaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2782/3765/files/lirukojifatupunokiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/fijimamisonodovemagunox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/5736426367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5943/6968/files/78204023149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/mupapuluzov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/89880061181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0303/4276/files/peribepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/pedawobivixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/61023837757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/81318719972.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000644c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 4456 bytes
SHA-256: 7b89e3c28aa2ba8202c86b6743ab699119872b7612e0d18a6ce8bd51925ff23b
font_01_sfnt_off00007347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7347 10260 bytes
SHA-256: 1c3078b31906668047b2351e431b3ba68ab0b642ca10a328faefde85759a4599
font_02_sfnt_off00009630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9630 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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