Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad50f292142a414…

MALICIOUS

PDF

41.3 KB Created: 2020-08-06 01:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5018681a8bcc69c4e55c86a8fceb14c1 SHA-1: 72a5c2b3aac0411c58a06772252da2f88ea80989 SHA-256: fad50f292142a414bc0882e8fb888470f9a5fed83f9d624f405630ace9dc8182
120 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 of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious infrastructure at `https://ttraff.cc/pify?keyword=pathophysiology+of+cardiogenic+shock+pdf`. This suggests a link farm or SEO poisoning tactic to lure victims to malicious content. The document body itself contains the same lure text and URLs, reinforcing the malicious intent.

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=pathophysiology+of+cardiogenic+shock+pdf
    • http://files.cathyskendrovich.com/uploads/1/3/1/3/131379719/6826173.pdf
    • http://tebulubaw.emeraldtoursgolf.com/uploads/1/3/2/7/132740541/bd0654.pdf
    • http://files.ihellary.com/uploads/1/3/1/6/131606208/vezigonekovomikoluv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/41723723510.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/68266939776.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/fugetokekodoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/cervantino_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/rovozalemadolatelaja.pdf
    • https://cdn.shopify.com/s/files/1/0440/0565/4678/files/butasawowagisejut.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/reddit_how_to_unhide.pdf
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/15609192772.pdf
    • https://cdn.shopify.com/s/files/1/0439/1524/7771/files/colts_logo_png.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9265/files/vexonuduwax.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_off00006282.bin
f10f1b9762d09445c15b8d0cf4cdd2c67db08bad310b54a3102e5a052263eec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6282 5584 bytes
font_01_sfnt_off00007587.bin
baa0f19c2523a78829d790391be18297b5df528c6748c2ff494d796f57281b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7587 10204 bytes

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