Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b276b560711b87…

MALICIOUS

PDF

90.0 KB Created: 2021-01-01 17:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7fb5575f5644cf6531476bc1f1e0b9b5 SHA-1: e7a1d9e2ef91061053dc622ec24b572ac2fdf9c7 SHA-256: f3b276b560711b876a717159d00da0a4f80cd14a0c4be98debec3bcc3895b25c
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to redirector domains, including 'traffmen.ru', which is flagged as malicious. The document body, though obfuscated, appears to be a lure related to Amtrak routes, suggesting a phishing or social engineering attack. The presence of multiple SEO-linked PDFs and redirector URLs indicates an attempt to drive traffic to malicious sites.

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.
  • 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://traffmen.ru/strik?utm_term=amtrak+routes+from+chicago+to+philadelphia In PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/22d40381d0a63.pdfIn PDF document text
    • https://wamonudikiso.weebly.com/uploads/1/3/0/7/130776885/08472b.pdfIn PDF document text
    • https://regafuraseni.weebly.com/uploads/1/3/4/6/134663643/wajapekevifef.pdfIn PDF document text
    • https://jopojikifereter.weebly.com/uploads/1/3/4/5/134519769/c59db937dfa8.pdfIn PDF document text
    • https://xuvowesajitox.weebly.com/uploads/1/3/4/6/134603534/berufagejubirif-vulebajanixikan-febom.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/7665092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408462/normal_5fa4e747838bd.pdfIn PDF document text
    • https://ruragivelexodi.weebly.com/uploads/1/3/4/6/134663557/a685df.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://s3.amazonaws.com/xapijifas/11059526.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/xusufosodexabuwodigi.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/43144248381.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/bukunmi_oluwasina_hey_soundtrack.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/national_budget_simulation_worksheet_quizlet.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_off00011401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11401 5400 bytes
SHA-256: 35399dd4e37203a05b1c8c451b2bc27a0b0c84cf9ed6bcc80580a36c7c4e9984
font_01_sfnt_off00012662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12662 11596 bytes
SHA-256: f1354ae93cd8e2b5f7a63f92b3fdc1155ebd643a19e635b1dcc2c7dafb83c758
font_02_sfnt_off00014c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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