Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c05a3f3e5fc2951…

MALICIOUS

PDF

47.6 KB Created: 2020-08-08 23:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9894b5acac2a9093667294eeee985398 SHA-1: b943558a4d483b3995de4cf82246c9455d80c819 SHA-256: 2c05a3f3e5fc29514c9badc905dbe53af9d3d1c047808979f5966d2882b2a225
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, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=blood+and+guts+a+short+history+of+medicine+pdf
    • http://files.dsmsewingparts.com/uploads/1/3/1/6/131636855/64b3e1d.pdf
    • http://files.bestofbothworldsnc.com/uploads/1/3/0/9/130969231/gepugimuxonol.pdf
    • http://files.ripplesoffaith.com/uploads/1/3/2/8/132814241/4650649.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/71502906444.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/24562998551.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/49926835920.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/sijejosaralafebug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3873/files/11246363514.pdf
    • https://cdn.shopify.com/s/files/1/0436/7450/1285/files/78990486949.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/houghton_county_snowfall.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/vadenoliluzidazeposix.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/pexupek.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4903/files/97987247739.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_off0000797b.bin
91b643a0e052d63c29766e1d8ccaf8e3be928a634701dd7a9a79eaad7e031edb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797B 5720 bytes
font_01_sfnt_off00008cd5.bin
018dc84b855f2e4545dd0d8f3fd82823f6f372ae4ef8567bbf69001e7a2f3f4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD5 10200 bytes

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