Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed432eb734a6d429…

MALICIOUS

PDF

32.3 KB Created: 2020-08-22 15:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d10f81ed97731aebd6c0b503e92361d1 SHA-1: 09c14a9c013397e76c363f46bff440d09b17c3d4 SHA-256: ed432eb734a6d429f1e8ec9499f07a9fb20c042badcb22b3ac1eba80a3ffd6a5
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a malicious redirector. The document body, though garbled, references a 'size guide' and includes the malicious URL, suggesting a lure. The presence of a link farm hosted on Shopify, combined with the redirector, indicates a campaign to drive traffic to potentially malicious content.

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/pify?keyword=foxiedox+size+guide
    • http://files.lynncociani.com/uploads/1/3/0/8/130814043/wilezepiwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/54043975021.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/96541792563.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/fb_chat_messenger_apps.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0031/files/myasthenia_gravis_drugs_to_avoid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/28029367314.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/65960095098.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/gogokideweraviret.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/56134907414.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0731/files/xefed.pdf
    • https://cdn.shopify.com/s/files/1/0437/8191/4781/files/relugimipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/tapotujizofesalij.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_off00004158.bin
21594eb30f42c2b599941a6e0f7cf0121b5e46bb62fa8d5d1e1aa0024851cfe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4158 4728 bytes
font_01_sfnt_off00005191.bin
5d57a471dd9ccfcbb59b4320261de8016623c7941b84c472960870c01b6cc780		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5191 10388 bytes

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