Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3100986a8c67857…

MALICIOUS

PDF

53.0 KB Created: 2020-08-05 11:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 662197f02c693908b57f901be1789c53 SHA-1: 1ddb914f54881d196d9d81560dcba5801baf3ba3 SHA-256: f3100986a8c67857566a82d5026466a276db5236ff1578586e0b612226a3e399
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=analytical+paper+example+pdf', is flagged as pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is an 'analytical paper example pdf', likely a lure to encourage clicks. The presence of a link farm and a malicious redirector indicates a phishing or redirection attack.

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=analytical+paper+example+pdf
    • http://files.zsystemsorder.com/uploads/1/3/0/7/130738993/faxubowikuguj.pdf
    • http://files.rossflemingdesign.com/uploads/1/3/2/7/132740193/2820fc0af29.pdf
    • http://files.udrentalsspp.com/uploads/1/3/1/1/131164097/332f482681b6.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/kaweni.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/xudodomovosigezas.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/caderno_de_encargos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/mewonosabekozipisudutekak.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5878/files/2632752895.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/45388366577.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/karla_spice_videos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/gifuwuzoduwomofaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40948382406.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/aimbot_for_shell_shockers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/11635847132.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_off000091d1.bin
5c9902e133b7d29fb817b1254904b0f08a0f905e4eace2029ff75787479c0ca3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D1 5284 bytes
font_01_sfnt_off0000a3c9.bin
2e1016c6e55bc375e851b612a44f9cd8df18124a5d3d34c0dd5b571c470cba31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C9 10376 bytes

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