Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53b0f046809cab2…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 08:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f591661be13486da21b093e7aafe579 SHA-1: d0224dad2a5bb56102546e746594f3855afd36de SHA-256: b53b0f046809cab25ec59b211b052c7d2f9297845f63169d8f82f9c73c31d098
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'Copious dogs mod' and the malicious redirector URL, suggesting a lure to a malicious site. The presence of numerous external PDF links further supports the attack pattern of a link farm designed to distribute malicious content.

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.cc/pify?keyword=copious+dogs+mod
    • http://files.compassionvet.com/uploads/1/3/1/6/131606069/9206395.pdf
    • http://files.gracebaptistlockport.com/uploads/1/3/0/8/130813366/nupov.pdf
    • http://files.fldvipn.com/uploads/1/3/1/4/131438439/1319896.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xubeke.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/dirotojumonenatuvije.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/57888092811.pdf
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/vosedup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/vefur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/51959327871.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/77654421744.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/wirorapafixutojigereme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b03.bin
851e73e416ab60c9c2e37e8c8b4721e9862b37b92f3395c6b9b733fa80cfb14d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B03 4848 bytes
font_01_sfnt_off00006b70.bin
73229e6b16c5b21ef3f1c0a21c33130fe81c9e0691c5d1d100741173e7c012fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B70 10148 bytes
font_02_sfnt_off00008e70.bin
6f41d85279102efce3c4bd26fddb767baf9b68a4f55e239fba9bedc2a2d3b953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E70 16064 bytes

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