Malicious PDF — malware analysis report

Static analysis result for SHA-256 23fb4fdd8674d373…

MALICIOUS

PDF

70.3 KB Created: 2020-12-23 14:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 56693a8bebe1f03e067e5699c68fad97 SHA-1: cc2dc05b7b0c06ea4c479abaa051299a85009e3b SHA-256: 23fb4fdd8674d37309c489f2b194e2ac295995815cd9e83ab88445ec90d6b36d
222 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically pointing to 'traffking.ru'. The document body, though heavily obfuscated, appears to reference 'offroad outlaws hack for iphone', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO manipulation and distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=offroad+outlaws+hack+for+iphone In PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5fcf158c4f7f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fc6915cb5714.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476569/normal_5fce95b8f1bff.pdfIn PDF document text
    • https://kawewadibuporak.weebly.com/uploads/1/3/4/3/134371142/20147.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/ramawelakage-tumuki-puwubimim.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/kosamupim/10495539510.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/the_giving_tree_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/17249615362.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/viper_acr_for_sale_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/c_alias_template_specialization.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/ethical_issues_in_international_business_practices.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/joxogigaseponiboxa.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/cry_the_beloved_country_full_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/ezreal_guide_mid_s8.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/nefexojirefuj.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_off0000d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD328 5424 bytes
SHA-256: 0c5bda699d8603aa2ddd971817c0bd512e99802fd9629f6111778cdde4972fdb
font_01_sfnt_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 11324 bytes
SHA-256: f83e9773b484f151edae9fed076bcd1d6d71aaeaf84b80fb567d9eadaf4019e1

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