Malicious PDF — malware analysis report

Static analysis result for SHA-256 23381d0c8fa3d976…

MALICIOUS

PDF

42.7 KB Created: 2020-08-18 16:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52cd46ca343b2e8c5f83971d63168726 SHA-1: 9b80380cc6ec6832eef37363592dffb83457d6b5 SHA-256: 23381d0c8fa3d9760d0dc3a67824bb5c197783758888f8c0325a73242f320059
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One prominent URL, 'https://ttraff.ru/pify?keyword=how+to+perform+all+brutalities+mk11', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and references to other PDF files hosted on Shopify, suggesting a coordinated effort to distribute malicious content.

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=how+to+perform+all+brutalities+mk11
    • http://fipen.chrislockett.com/uploads/1/3/0/7/130775422/36271e4bbe036.pdf
    • http://files.oaklandovereverything.com/uploads/1/3/0/9/130969966/dituvowedatazopuzog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/raboviladota.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/sodazuzedanijibugefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9538/3446/files/89859250373.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/konubanuse.pdf
    • https://cdn.shopify.com/s/files/1/0447/7183/6055/files/biosecurity_in_poultry.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/229980893.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/25598927689.pdf
    • https://cdn.shopify.com/s/files/1/0440/0414/7350/files/33941086170.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/konesewujeda.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_off00006863.bin
48f792f4f12c128ca41b271a3b819232305ce1fa03d629d6de5ad606f6297461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6863 5356 bytes
font_01_sfnt_off00007a91.bin
0ed0494ab06e99c5ba089509bd597715608bcf08273ed7bc5876c38978d53d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A91 10520 bytes

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