Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39a3958e8044f90…

MALICIOUS

PDF

44.9 KB Created: 2020-08-19 08:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff7a722616640a977302660975c6e128 SHA-1: 6969a2405862b81050c2a8e868a7529448cbd253 SHA-256: b39a3958e8044f90cae798fafcf73789377825e2ec0c630f19a3b94a69833140
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as an 'epf withdrawal form 15g'. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files hosted on external domains. The primary intent appears to be directing users to malicious infrastructure through these deceptive links.

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=epf+withdrawal+form+15g In PDF document text
    • http://diduwon.silverdalevillagemarket.co.nz/uploads/1/3/1/3/131398404/tilajoxixejep.pdfIn PDF document text
    • http://files.shragagafni.com/uploads/1/3/1/4/131413718/mujuxuxejetuju.pdfIn PDF document text
    • http://files.naturallysport.net/uploads/1/3/1/1/131163738/7369754.pdfIn PDF document text
    • http://vigidiw.londonstreetgallery.org/uploads/1/3/1/3/131398003/sorajibosabo-deriwenimaf-bexifesimi-zanalu.pdfIn PDF document text
    • http://nejowef.murchiebhs.com/uploads/1/3/0/7/130740178/fabitikuwoxudub-zebazam-fuseza-moperodumaraj.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/1/0438/3614/5814/files/bapenekezipulejegag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/ice_sheet_calving_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/1322219195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/bepekazazetesesejuvapejaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1914/0253/files/ayushman_bharat_yojana_registration_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/bexano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9332/7008/files/kekivobalakunovot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rofimoluxita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/maladie_d_alzheimer_traitement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/wumenuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/velokiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3825/0910/files/minute_maid_seating_guide.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 5068 bytes
SHA-256: f7fffe91631e442c854970e67c8051a06ff927778bf776ad15988d6a08ced6cf
font_01_sfnt_off000075a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A2 10252 bytes
SHA-256: e9e0c35485cdb34a9ecacd6d7123a3fa74447eae1af4702ee9a73dd40b920b65
font_02_sfnt_off000098a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3