Malicious PDF — malware analysis report

Static analysis result for SHA-256 17752212a37d04b3…

MALICIOUS

PDF

66.0 KB Created: 2020-12-22 02:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4058e4e1bf92251e8eaab043c0cd12c4 SHA-1: 7acfe1fbf97e6b6cd3acc12e04caf4de2e3af2e3 SHA-256: 17752212a37d04b3035ac1ceb1f92d612f27503475dafbe4ca2a6dad100c534b
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure, indicating a link farm designed to manipulate search engine results or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the primary attack vector appears to be user interaction with the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=article+15+full+movie++moviescounter
    • https://wapatawavef.weebly.com/uploads/1/3/4/7/134775304/728fb8.pdf
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f89591fad590.pdf
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/wiviza.pdf
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/rafafo.pdf
    • https://woxevodojagub.weebly.com/uploads/1/3/4/6/134623787/pimogivagew.pdf
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/208efdd.pdf
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/xitetibupofibol.pdf
    • https://tujowijide.weebly.com/uploads/1/3/0/9/130969571/629dfb2037.pdf
    • https://cdn-cms.f-static.net/uploads/4420906/normal_5fb5d73b4a1d5.pdf
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/wadiz-jedigubi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9b0eccef-0dbc-4693-b730-3b890aca7c98/vopiwuz.pdf
    • https://uploads.strikinglycdn.com/files/515673b2-3edc-4260-9351-bb99a0a1981a/soporonugebomifuf.pdf
    • https://uploads.strikinglycdn.com/files/06fc6d18-164c-4e01-bb87-fda5bcd4ab8f/45176393223.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_off0000c731.bin
d6ab3579f129674a9f470962837ff40679c928b9f03f9486872b5b1a9390fbf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC731 5040 bytes
font_01_sfnt_off0000d85d.bin
d0ba748cd7629757f6b0082a496fc22cefd46b96f5d7107777faa862be9d472c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD85D 10200 bytes

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