Malicious PDF — malware analysis report

Static analysis result for SHA-256 1088ad2e1ca2995b…

MALICIOUS

PDF

96.3 KB Created: 2021-01-12 01:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2edbf6ffa3a3517f9731cd3a2812270f SHA-1: 38d852e68253824ad8041d0591538ed4cec78f7c SHA-256: 1088ad2e1ca2995b2b429079b10c3824050b2afe56ded73d9d831723bce97d52
222 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, including a known malicious redirector at 'traffmen.ru'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate malicious intent to redirect users to harmful content. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/aws?utm_term=psychosis+creepypasta+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fdeec8660f04.pdfIn PDF document text
    • https://lukejofavum.weebly.com/uploads/1/3/4/4/134455809/vejurok.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/UWwja6Y/bekojofa.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/gckghgi/37892309234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5f8c96a72596d.pdfIn PDF document text
    • https://cdn.sqhk.co/rogumabutur/bhia9he/download_mobizen_screen_mirroring_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/jasgdXf/love_island_usa_season_1_where_to_watch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369930/normal_5ff12e7b68cc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478926/normal_5fd2cb52901e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393503/normal_5ffaaf9a3097b.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/ijtgcQe/roads_of_rome_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366047/normal_5ff3afd5ece96.pdfIn PDF document text
    • https://cdn.sqhk.co/mejapevelu/A22Hhe0/zombie_party_favor_ideas_for_bridal_shower.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/instagram_layout_template_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/gixepanufozuxadixebedag.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4C 5312 bytes
SHA-256: a38a741cc354b1180fbe1c732c9ece8496abd5a340eeaaf6f830f4fc92f2e8cd
font_01_sfnt_off00014f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F60 10520 bytes
SHA-256: 8112110dc1a901683a6253ffdb0f58130f952413d9a38f334dcc3ce1fe14e479

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