Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c890333dee5e6f3…

MALICIOUS

PDF

40.7 KB Created: 2020-08-16 21:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d9bc2b733b743b8961c7ca989a1765 SHA-1: 8e8871ada3580423385105821299a612e83ceef0 SHA-256: 4c890333dee5e6f317d76aea9d1dfe2022965fe4079b50eb03b2cfb07310b80e
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=board+agenda+template+uk'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=board+agenda+template+uk
    • http://files.milecreekfarmsixmilesc.com/uploads/1/3/1/0/131070144/e5f870807.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/80703386812.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0134/files/45079018021.pdf
    • https://cdn.shopify.com/s/files/1/0437/7791/7085/files/shimano_acera_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/definition_de_l_argumentation.pdf
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/94610631939.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/marijusuzemaritefulorenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/19560824170.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/69797451538.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/java_tutorial_for_beginners_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/arithmetic_progression_class_10_ncert_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/gubim.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9647/files/bewadaxaluridolef.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_off000060a0.bin
aed843a8f8d3e6ea39a774f9149608d8fcbce816a044dd9e8402cc41a6207f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A0 5216 bytes
font_01_sfnt_off00007243.bin
04aaf8814da49ffd7ded0e1eab55425912df6647885bfc90d8a0706b86204d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7243 10588 bytes

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