Malicious PDF — malware analysis report

Static analysis result for SHA-256 546559083a31e47f…

MALICIOUS

PDF

63.4 KB Created: 2021-01-06 14:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7285885a6619be61a02b479cba6cb167 SHA-1: df8e730d20ccfcb12a474626444b3e162680b2e8 SHA-256: 546559083a31e47f105dc490df14a362bf7b4d8ed4c890df375d059f76df78af
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'traffmen.ru'. The ML classifier and ClamAV also flagged this file as malicious, suggesting a phishing or trojanized document. No scripts were extracted, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=manual+cabbage+slicer+cabetsukun+%25D0%25BA%25D1%2583%25D0%25BF%25D0%25B8%25D1%2582%25D1%258C
    • https://tevuvusit.weebly.com/uploads/1/3/4/3/134373155/gisezivawijixa_kubelajer_mobuwuzo_lurul.pdf
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/dobotewidep-fomiredon-bunagin-zafubimijedag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sikuva/distributed_systems_principles_and_paradigms.pdf
    • https://s3.amazonaws.com/dinisemowoge/dumurefuferag.pdf
    • https://s3.amazonaws.com/wopari/fha_appraisal_inspection_guidelines.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/zobuditub.pdf
    • https://uploads.strikinglycdn.com/files/85eca6f4-5873-4d09-8c4f-5644ec91bd39/kofezore.pdf
    • https://s3.amazonaws.com/povodijirig/charged_up_drake.pdf
    • https://s3.amazonaws.com/guxosa/kingdom_of_heaven_imdb_parents_guide.pdf
    • https://uploads.strikinglycdn.com/files/5adf4a37-ebee-4354-86ed-efcd15a8afa2/80559983702.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb24.bin
1a1e2aa7a124fdea394493914f118bd0870fd94f59f22de35fb179a439a0f990
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB24 5632 bytes
font_01_sfnt_off0000ce88.bin
89368ee4ee9f3597244368ce27606ab6d07477117d3162f6c230e1e3f1be56b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE88 9512 bytes