Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d4dc2710ceaf8f…

MALICIOUS

PDF

81.6 KB Created: 2020-11-26 09:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9faab4593316984ceec118d25bf4acf7 SHA-1: 08047031538e76779a4d1c05413ed2d9a9c59b12 SHA-256: d3d4dc2710ceaf8fb553e4801ca422039481e52ee17d4704affa882f07895a78
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pattern. The primary URL, 'https://trafftec.ru/strik?utm_term=air+hogs+hawk+eye+manual', suggests a lure to a potentially malicious site. While no scripts were explicitly extracted, the presence of external links and the ML classification strongly indicate malicious intent, likely for SEO manipulation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=air+hogs+hawk+eye+manual
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5f9778833491a.pdf
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/1099919.pdf
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f8e7f4f9bf74.pdf
    • https://cdn-cms.f-static.net/uploads/4460975/normal_5fa3017b37cbd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/802fc1f0-2879-441b-b784-a395877ff6a4/39894750419.pdf
    • https://s3.amazonaws.com/wenobagupexekap/concrete_mixing_ratio_table.pdf
    • https://uploads.strikinglycdn.com/files/a9fc281a-6721-4ec2-8196-a4832d411cc9/a_beautiful_wedding_jamie_mcguire_english_download.pdf
    • https://uploads.strikinglycdn.com/files/8e80f800-0501-4eff-9da6-9ae40ab8e2ba/dolphin_emulator_game_downloads.pdf
    • https://uploads.strikinglycdn.com/files/0b477f56-8fac-452f-8c9b-cea43f1aca70/nemikaw.pdf
    • https://s3.amazonaws.com/lijopavexanuse/maxujoxu.pdf
    • https://uploads.strikinglycdn.com/files/a53084ea-b03f-4645-a93f-e41e4a37b2da/free_rp_diet_menu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff41.bin
e799f80dff645b97c737d61d984984d8348d0056221cccc48acdc8654f6c86bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 5348 bytes
font_01_sfnt_off0001115e.bin
6a1beabd33c29990d6e358d304ae9085dd8374da70139778bf1e6793d12a2631
pdf-font-stream PDF embedded font (sfnt) at offset 0x1115E 12152 bytes