Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d8acf2777a99fb…

MALICIOUS

PDF

62.1 KB Created: 2020-08-01 13:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e4c87a37e791de391a08b896c6ba2c52 SHA-1: 3043b3a82e3adadd59f0acad10b0ca28dd0f9776 SHA-256: 13d8acf2777a99fb0aba53f96e37bd9f25285b555ac72db1df540336ec3a98d1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, including one pointing to a known malicious redirector (https://ttraff.ru/pify?keyword=40.+717514%252C+73.+998139). This indicates an attempt to redirect the user to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=40.+717514%252C+73.+998139 In PDF document text
    • http://files.montanabirdhunts.com/uploads/1/3/1/6/131607712/fanibuneladi-rijezapanututaz-demijejosemal-rumiporulaluk.pdfIn PDF document text
    • http://files.ncam.ac.nz/uploads/1/3/0/7/130776788/a94fe6a1c2f25a.pdfIn PDF document text
    • http://files.blueacesbakeshoppe.com/uploads/1/3/2/6/132696263/1387438.pdfIn PDF document text
    • http://files.tcfrochester.org/uploads/1/3/0/8/130873937/921e0d.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/1/0432/1456/9631/files/54486856098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/48007624783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/14146529011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/gajezipebevemanijavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8477/5578/files/23953146656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/acronis_bootable_media.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/mabepin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5813/files/32245261793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/what_is_the_largest_discord_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/tamadufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7461/6472/files/jawajawubetuvaro.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_off0000a7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7EE 5156 bytes
SHA-256: 5be2c317745643031fea7689c9d6536728f6689dadf8cd706ce8b6bca8c61bce
font_01_sfnt_off0000b9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B7 16324 bytes
SHA-256: de058f331f3d6d6f913be7f156bb4d2ed56ef3f0a245e239a427f180554f164a

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