Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0b6e8381eef78e…

MALICIOUS

PDF

95.0 KB Created: 2021-01-15 14:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e17c5bf8cc6e6e2193ee51a2fbf65159 SHA-1: 8131d110b75c189aee52b113cad3c514c86aaf9c SHA-256: 1a0b6e8381eef78e8c668280967d43c3478e8c6ecdd8e1bfc92828ac78b22135
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, including detections for malicious redirector links and SEO link farms. The document contains numerous embedded URLs pointing to disposable hosting and redirector infrastructure, such as https://cctraff.ru/aws?utm_term=transformers+robots+in+disguise+toys+autobot+drift, which likely serve to distribute further malware or conduct phishing. The presence of these links and the overall structure suggest an attempt to exploit user curiosity or search engine optimization tactics for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://cctraff.ru/aws?utm_term=transformers+robots+in+disguise+toys+autobot+drift In PDF document text
    • https://site-1174183.mozfiles.com/files/1174183/48361136480.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/6e5fc8b950a60d.pdfIn PDF document text
    • https://site-1168360.mozfiles.com/files/1168360/super_dragon_ball_heroes_kefla_vs_zamasu.pdfIn PDF document text
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/5753908.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/jEihvgj/47809380493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f8c13689ec77.pdfIn PDF document text
    • https://site-1176846.mozfiles.com/files/1176846/16089578153.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/hjfjbii/cnc_router_table_4x4.pdfIn PDF document text
    • https://biwiporiv.weebly.com/uploads/1/3/4/6/134620494/0fb444b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f9a964c3f53d.pdfIn PDF document text
    • https://wazaxilam.weebly.com/uploads/1/3/4/7/134726650/f8135a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_5fefa618869da.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/wozipizu.pdfIn PDF document text
    • https://netopanuneju.weebly.com/uploads/1/3/4/4/134493403/lufudot.pdfIn PDF document text
    • https://site-1180530.mozfiles.com/files/1180530/62071493016.pdfIn PDF document text
    • https://site-1175083.mozfiles.com/files/1175083/pebuxoxat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00013719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13719 5384 bytes
SHA-256: d982a0d77d6dc5a7029b92e07096c2ecf88a7524bc887172397ac39b6b2c59ea
font_01_sfnt_off00014956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14956 11004 bytes
SHA-256: ae7107fa198bd1c77e35b42949f91ad31f0497246dda2bfb4e33b65e34b1a9a8

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