Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8f640867224e74…

MALICIOUS

PDF

45.1 KB Created: 2020-08-11 02:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c9ba0697eb0355bc5b2c45ab934fc03a SHA-1: 2f0c424cded8682a7ef2f5dd1a819418d39be56a SHA-256: 4e8f640867224e74a4ab33e89223d1018e850d6d1bfea6bf91098c2311d3fc72
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which points to a known malicious redirector (ttraff.com). The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute 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=software+defined+mobile+networks+sdmn+pdf In PDF document text
    • http://files.toddwyant.com/uploads/1/3/1/8/131856624/4188643.pdfIn PDF document text
    • http://vewedove.rbreakironandassociates.com/uploads/1/3/1/3/131383791/xedujojabivelevot.pdfIn PDF document text
    • http://files.pacificcascadefarms.com/uploads/1/3/1/3/131381919/f49353d0da7aa5.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/1/0432/2125/4312/files/totobeduvoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/running_record_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1261/0472/files/95192768421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/12422639519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2582/4929/files/no_man_s_sky_nitrogen_salt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5778/2694/files/86148703511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/28515515621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7437/8142/files/accelerated_learning_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/zojevozekokomenizino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/bevarevitibovofezul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/pm_awas_yojana_rural_form.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_off0000645c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645C 5372 bytes
SHA-256: 5686b88d0b22ea618ff6b614c26ce1ede721bf1439641aa6659320daea2ee742
font_01_sfnt_off0000768a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768A 10156 bytes
SHA-256: 0743f68460e6a61de47334081244fc32e204d6a12329483b1ccaf1e212c0d3a7
font_02_sfnt_off00009952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9952 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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