Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d961db466b2303b…

MALICIOUS

PDF

42.6 KB Created: 2020-10-04 05:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dcfbe36b02c7cb7af3a96f63e0632f7d SHA-1: f2b862dfe7d6922e2ac30860231d97c149586602 SHA-256: 9d961db466b2303bfc31253958dfeed80e3b1f5d44c2ea30f97a2703cbe78c0a
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, https://cctraff.ru/strik?keyword=vintage+manual+card+shuffler, is identified as malicious redirector infrastructure. The document's structure and the presence of numerous links suggest an attempt to lure users to malicious or potentially harmful content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/strik?keyword=vintage+manual+card+shuffler In PDF document text
    • http://files.elizabethadabale.com/uploads/1/3/0/7/130776487/zotijajugapero.pdfIn PDF document text
    • http://files.tzununahealthyself.com/uploads/1/3/1/4/131406982/3ecee4.pdfIn PDF document text
    • http://sunisivan.lathemsmill.org/uploads/1/3/0/9/130969060/gakipajirufezunime.pdfIn PDF document text
    • http://vezowuliz.amazoniron.com/uploads/1/3/0/7/130740510/8924192.pdfIn PDF document text
    • http://subaral.perioflorida.com/uploads/1/3/1/3/131384169/bb6011c.pdfIn PDF document text
    • http://files.anotherlogonthefire.com/uploads/1/3/0/7/130775772/nalexo.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://cdn.shopify.com/s/files/1/0435/9133/6099/files/dorufamakevexud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7602/1145/files/57593582083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8254/9922/files/bob_sport_utility_stroller_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/partido_nacionalista_peruano_objetivos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4562/9335/files/1854964418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90721bf2-b07f-4ce1-bc24-a65c386810d0/vuxipub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa3b5c6-1179-4cf4-be68-386089b86046/52822194683.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_off00005a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A22 5172 bytes
SHA-256: 14fea757deca91c019e1814f3d5fa5c0346e56cee5b527ea10a9077a7e1ce7cc
font_01_sfnt_off00006b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B84 10172 bytes
SHA-256: a7be2a5240d79406b82004eb4268f4af0f42b04f20e145e9bc99a1695f41edb4
font_02_sfnt_off00008e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.