Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37584b8291eaa58…

MALICIOUS

PDF

44.3 KB Created: 2020-08-20 01:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3dc50119a01d139cede808929d7fafbe SHA-1: 9fb92bd3cf80d3915d2845b682e231413bbec610 SHA-256: a37584b8291eaa5870580bc103c33a1a405fcb28182c300205617c2f4309217b
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=geotechnical+survey+report', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'geotechnical survey report', suggesting a lure to entice users to click the malicious links. No scripts were extracted, but the PDF structure itself facilitates the attack.

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=geotechnical+survey+report In PDF document text
    • http://files.kokmatoys.com/uploads/1/3/0/7/130739971/1962791.pdfIn PDF document text
    • http://maguw.mysticmancreations.com/uploads/1/3/2/6/132680981/pipupidinamolaw.pdfIn PDF document text
    • http://files.womansclubofpowhatan.org/uploads/1/3/1/0/131069934/841ee4dc3dcd81b.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/1/0437/9957/6733/files/novomubileku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5734/7746/files/brother_xl2600i_sewing_machines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/63718630648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/94952263578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1228/2789/files/83538143347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/36851875464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2925/6602/files/sajaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/gurenazutizapebemarik.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 8

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_off000070b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B4 5212 bytes
SHA-256: 41670580aeb7a5480970a1d4118c643f26e44b4fad27846442d37a70fd64bab3
font_01_sfnt_off0000826f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826F 10012 bytes
SHA-256: 1a0832c216d72d9bbe04e02415b7c615dd2151fe783583b174c974408012126d

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