Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4b7d6f61a838f5…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 01:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e37c9f994f79977cb221b2d953f10bd SHA-1: 41e67905b9bf271174f5915f5628c5365d7d1645 SHA-256: 4b4b7d6f61a838f55c4af6e8b1fd3b66d5624f3d91708731b6df769d65e609f9
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body itself is heavily obfuscated but contains references to 'odt to pdf' and the wkhtmltopdf tool, suggesting a lure to convert documents. The embedded links likely serve to direct users to phishing pages or download further malware. No scripts were extracted from this sample.

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=odt+to+pdf In PDF document text
    • http://files.bearlymade.net/uploads/1/3/1/6/131606453/nonofuxakobegesez.pdfIn PDF document text
    • http://files.bridgewaterdairy.com/uploads/1/3/1/4/131438079/66540c5.pdfIn PDF document text
    • http://files.beautifulfacesbyerin.com/uploads/1/3/1/3/131380440/bfe120e.pdfIn PDF document text
    • http://files.clatchetproductionsllc.com/uploads/1/3/0/7/130776312/3911227.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/1/0430/5806/9655/files/40175233667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9277/8916/files/96546729316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/54680098868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/12115177458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0501/7253/files/witisilose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/39688217574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/21780448627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/xepunokivunusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/whirlpool_quiet_partner_ii_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/xubikovagekiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/55061407308.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00005891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5891 4544 bytes
SHA-256: 0e0fd9c1eb4ed72acf3e1c6e719f71b198a0efda7e3a15c57eded6c843129063
font_01_sfnt_off0000681d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 15128 bytes
SHA-256: c36093e6e80c6cfa014cb12faa2f1c49c76139933f21e73804f22f43269d3a67
font_02_sfnt_off0000912b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912B 16076 bytes
SHA-256: 75fb5eda6c80430b94b20cb0daa906e0e98a9f633c3ecfcf71c743d7414a59fc

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