Malicious PDF — malware analysis report

Static analysis result for SHA-256 be95d06f8c86a827…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 11:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7200d36b71ed9070d764f40e7666d77 SHA-1: 6d7c455e86477531f1c92e80db1595b486eae85c SHA-256: be95d06f8c86a8277ec9a580e25f82d32027ed26b69dca360955cde903f36576
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'anime drawing books for beginners pdf' and includes the malicious URL. The presence of a large number of external PDF links further supports a link-farming or redirection-based attack. The ML classifier also strongly flagged this PDF as malicious.

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=anime+drawing+books+for+beginners+pdf
    • http://files.cityofwillowriver.com/uploads/1/3/1/4/131438240/e054704a1.pdf
    • http://files.viewthis247.com/uploads/1/3/2/3/132302716/1379390.pdf
    • http://mawefadij.uciphideltaepsilon.org/uploads/1/3/1/3/131380345/2701cb6b180dd.pdf
    • http://files.suehuitt.com/uploads/1/3/2/6/132681028/6436100.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/51259542350.pdf
    • https://cdn.shopify.com/s/files/1/0438/6432/6299/files/30217431013.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/nadokalalexutirojeveg.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/ukulele_soprano_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/76921673433.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/72978882192.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/27911521702.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/numebel.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/25439638818.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/moruxusajuruwitis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38967404473.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/13598602036.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_off0000667c.bin
72a22fd782a4499e8e4556f0cc650afcd40b65330fd686fc5204bd6543bb43ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667C 5612 bytes
font_01_sfnt_off0000798e.bin
e7e90ebd3e0be092056c67e665acdeac47c6f27a98208dcbe0c131c4209ff62f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x798E 10708 bytes

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