Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d9c31f72c4b285…

MALICIOUS

PDF

43.9 KB Created: 2020-08-20 08:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7158d22c70088b80499cd35c0b0362ab SHA-1: 2a2a1ed6956da806a38d491c1e8c48fa41ce0461 SHA-256: 86d9c31f72c4b285cec67e78b7c8eb5c40b175870a0f0f39c78d6d5b44cdcef3
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=roof+inspection+report+template+free'. The document body, though heavily obfuscated, also contains this URL and references a 'roof inspection report template free', suggesting a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=roof+inspection+report+template+free
    • http://files.thedailyamg.com/uploads/1/3/1/4/131454620/957933.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tulajemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8440/files/resume_letter_samples.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/bending_machine_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/on_college_letterhead_bonafide_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/wisobijudidomiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/40279598533.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/nutamem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8124/4577/files/rerufonikoxinoxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5431/files/xemejofinapunutep.pdf
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/milokatasojemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.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_off00006bb9.bin
940b968c41f8b6f38e3bd04ff968b5c3a319e616543144905429fff917863a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB9 5168 bytes
font_01_sfnt_off00007d38.bin
4bc3893247f492efcfc80ceffe1a7138fe11c8f02df5dc30ceeef4ca89dc0701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 11788 bytes

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