Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2b3aa8bb67fa36…

MALICIOUS

PDF

35.4 KB Created: 2020-08-15 01:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 345fd5290b824b95725bc29743693b4e SHA-1: 826492440598f2879c8d3ee97182b4449220dfe0 SHA-256: 3c2b3aa8bb67fa3662aceeba7885e82fe688d457ab0770ab8096f96b2c26dd45
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One critical heuristic identified a link to a known malicious redirector, traff.ru, which is likely used to obscure the final destination of the attack. Another heuristic indicates a PDF link farm, suggesting a large number of outbound links designed to lead users to malicious content. The document body contains garbled text and embedded URLs, further supporting the malicious intent.

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=lathem+atomic+time+clock%2528+1600e+manual In PDF document text
    • http://bumilo.mytls.org/uploads/1/3/0/7/130776644/nobubitu.pdfIn PDF document text
    • http://files.itshumannature.org/uploads/1/3/2/7/132712093/8555664.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/1/0430/5960/9753/files/63162892934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/maine_pyaar_kiya_songs._com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4151/1834/files/40037345219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6883/1382/files/pesinifepiwazidetaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/58639172288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/gefafopodedoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pidepuwavulosetanujerepub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29318048561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3522/8317/files/49587884363.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
🗂 Part of campaign: blues-city-kids.com 7 samples

Related samples 1

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_off00004b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7C 5196 bytes
SHA-256: ef840eca475cd3afc239f99e52a18f00f19adcd4cfec4a877758cb24bb6baa04
font_01_sfnt_off00005d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D22 10376 bytes
SHA-256: 715856ddd3665aae3dc01378935332ece5e288f7c214bd45481dd5a4ac65a55c

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