Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7d64f951ccdac6…

MALICIOUS

PDF

80.3 KB Created: 2021-01-15 07:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 144cacc3ec7bdfc02e6ab017d757c083 SHA-1: cd8e71e0fc7f075a3a3e1af5f682af96b49ee55e SHA-256: ac7d64f951ccdac62acb6d70a85348ebff3097c9a963ad6754e850857bde24d0
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The primary link identified, 'ggtraff.ru', is known to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through link farms. No scripts were extracted, but the structure suggests a lure to exploit vulnerabilities or redirect to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/aws?utm_term=affine+transformation+python+points In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_5fd3486652815.pdfIn PDF document text
    • https://site-1237964.mozfiles.com/files/1237964/nice_guidelines_heart_failure_reduced_ejection_fraction.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/0023b3.pdfIn PDF document text
    • https://site-1168029.mozfiles.com/files/1168029/the_cw_channel_number.pdfIn PDF document text
    • https://wixefonimav.weebly.com/uploads/1/3/1/4/131437632/7473181.pdfIn PDF document text
    • https://roxejane.weebly.com/uploads/1/3/4/4/134486752/30f907720c3246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_5fb2f598c4292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f94dc6fa2504.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/7067754.pdfIn PDF document text
    • https://dopakuxapat.weebly.com/uploads/1/3/4/8/134895633/9220618.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419847/normal_5fe0462d344db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5fad39e4a4151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_5fd30f735eeb6.pdfIn PDF document text
    • https://site-1172629.mozfiles.com/files/1172629/mit_application_fee_for_international_students.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/dobesogum/60577119902.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/liwutosu.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_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 4988 bytes
SHA-256: d71e6ea1d5658d1609306c4fadb7c4f00ee7467b6272818dc5d1142c0191b5a7
font_01_sfnt_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 13300 bytes
SHA-256: 773e6861aa010b6ba44ab5131dda13c01504781b3db16e3d2fb260ad46f4b6bb
font_02_sfnt_off0001262c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f