Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31047404590c649…

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 00:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91a9dfea57d7d71466c53d3594370ed7 SHA-1: 548b7fbaac3deea8f2bfdb1976a5fc3ea5603456 SHA-256: a31047404590c64971de4b95e2cbfe382e645839cd5e9ac1692f66be16872359
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised as a "draw.io family tree template". The document also hosts a large number of external PDF links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse. The primary malicious link is https://ttraff.cc/pify?keyword=draw.+io+family+tree+template, which likely leads to further malicious content. The file was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=draw.+io+family+tree+template
    • http://pusoruna.coolanniestravels.com/uploads/1/3/1/3/131379578/7738159.pdf
    • http://gobub.tiffanyalesha.com/uploads/1/3/0/7/130776688/lasukakaxozajapeb.pdf
    • http://files.kilthaog.com/uploads/1/3/0/7/130775712/bumukumozuzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/zosonigakosiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/vuwifokefafanole.pdf
    • https://cdn.shopify.com/s/files/1/0435/7190/4673/files/51934759607.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/discussion_method_of_teaching.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/demon_s_great_hammer.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8912/files/98523134468.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/icy_veins_diablo_3_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/buried_child_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75877947267.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/caracteristicas_psicologicas_del_ser_humano.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_off00006fa3.bin
e8b3f3951716790abfc397dc5028328f85ca615df5f5756b3f7eb45e2c2ea1f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA3 5092 bytes
font_01_sfnt_off000080fe.bin
ec7128d44b4265010d222c7c429e01180c5497669c7b9de4910c1e79c1ff0011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FE 10304 bytes

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