Malicious PDF — malware analysis report

Static analysis result for SHA-256 8404a10891123984…

MALICIOUS

PDF

50.2 KB Created: 2020-08-18 14:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5527d1d821c9d6230f8a01f7d45fe9d SHA-1: 5d4610e8f8cc326ede2bd26a1d381cacacd1feab SHA-256: 8404a10891123984f4d95634fb7ac68cc5ce65f329587d6d6bcc9cad4c1a637b
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 redirector infrastructure designed to lead users to malicious sites. The document body itself contains a URL that is part of a link farm, suggesting an attempt to manipulate search engine results for malicious purposes. The ML classifier also strongly indicated maliciousness.

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=narasimham+songs+free++malayalam In PDF document text
    • http://files.salayhouseburma.com/uploads/1/3/1/4/131407274/rowoliza.pdfIn PDF document text
    • http://files.jerseyco911.com/uploads/1/3/2/6/132680901/pujorikuj.pdfIn PDF document text
    • http://files.affinityspeech.com/uploads/1/3/1/4/131453194/gakumadod_fatanozupuvoxaf_vewix_wikoxerikawogo.pdfIn PDF document text
    • http://files.evansmstheatre.com/uploads/1/3/1/6/131637257/sexore.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/1/0444/4736/7335/files/belt_bucket_elevator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/shigley_mechanical_engineering_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8845/2515/files/dieta_astringente_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/how_do_you_draw_a_heart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/fiwibav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/riwogizowelenat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/40503214178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/94662461810.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8206 5252 bytes
SHA-256: 1abf1fdf58fe3e5b42f5ad1ee93e87b0936c8053e0a5ba739a04cf5310f8ccfa
font_01_sfnt_off000093cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CB 12580 bytes
SHA-256: 45f8ecc19a68a049df3d8b076f87e02bf801c730f816285dd09a146665e31831

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