Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ca5598e441c180…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 23:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd00b09c369d6352c990759f5f9373d8 SHA-1: 791e14516d9ec20d9a5b66e76ef40941d6be24b5 SHA-256: d6ca5598e441c180a4174268140e602f452eb9481ee9febe604d04ae553c1091
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to further malicious sites. The document body also contains this URL, suggesting it's the primary lure. The heuristic PDF_SEO_LINK_FARM indicates the PDF is part of a larger link farm, likely for SEO poisoning or distributing malware. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.ru/wb?keyword=tp%20link%20archer%20c60%20manual%20portugues
    • http://files.continentalmix.com/uploads/1/3/0/9/130969448/sidorafidemob.pdf
    • http://files.feelgoodafterfifty.com/uploads/1/3/1/4/131453924/domibilolugur-ripip-jawere-zijimatevuzolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/64121483120.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/texas_nursing_jurisprudence_exam_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/480912528.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pagujusevidunevaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/25384251023.pdf
    • https://cdn.shopify.com/s/files/1/0432/0418/2173/files/7402968135.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/6620480451.pdf
    • https://cdn.shopify.com/s/files/1/0435/3156/7256/files/54345817715.pdf
    • https://cdn.shopify.com/s/files/1/0428/4756/8039/files/56127960505.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/sovulobinovir.pdf
    • https://cdn.shopify.com/s/files/1/0428/6598/3655/files/venulokaletezedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/witiwunibejazagerowulot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95936092566.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d9.bin
5d9c56aed1bfb3ba2cabebc3089fe59ed26f7a36180b2278e97595616f878797
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 5656 bytes
font_01_sfnt_off000073e5.bin
f047028196790dcce06d23a997dc135790d9427e0e6763c204ab4c0466ef618b
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E5 12672 bytes