Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddcb67b914e332c…

MALICIOUS

PDF

39.3 KB Created: 2020-08-18 13:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 055a8b3c578f8e8ca49f17fabb79c818 SHA-1: 5ade5a6d91b1bc36ef06b3c010b856f1d13b30fb SHA-256: 3ddcb67b914e332cd0ee356891cfa3ab3eeed48dee9aa700c5467f86fc12ff64
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=audit+report+types+pdf, which is likely used to lure users into downloading further malicious content or visiting phishing sites. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a link farm or redirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=audit+report+types+pdf
    • http://files.mjglobalcommunications.com/uploads/1/3/0/7/130776817/puxotovofes.pdf
    • http://files.bybliss.com/uploads/1/3/1/3/131379759/6d73dd.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/sasozafudi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/28821992689.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/60045598342.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/47178374898.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/gibudinaberezaxalog.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/57834592033.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/diamantito_legendario.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/data_structures_and_algorithms_made_easy_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/zefududiw.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_off00005e06.bin
dedff49ff1c963fab97ba6cea2827702f07d9bd320be5d1222b9849c82ae0958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E06 4884 bytes
font_01_sfnt_off00006ebf.bin
0c7549f6b001a58a7ddf9d51af922579c9d005dee2f7cfdb3e7d39de2e9facee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBF 10012 bytes

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