Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da976f7011d0e2a…

MALICIOUS

PDF

46.3 KB Created: 2020-08-25 16:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff2d8e2b12ba13cd0a18304b795fd56e SHA-1: 700520bec3d3eb88a7bc6a487dfbc28cf9fc9da9 SHA-256: 3da976f7011d0e2a608233d4080dd3565d3172f811a1cc2f8087ad3dfb33b16b
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.com/pify?keyword=bcd+arithmetic+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a coordinated effort to lure users to malicious sites. The presence of a malicious redirector strongly indicates an intent to deliver a malicious payload or conduct phishing.

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=bcd+arithmetic+pdf
    • http://mulila.wildswimbikerun.com/uploads/1/3/1/4/131409090/f3ad16b27cc7941.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/the_ed_miracle_ingredients.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/4779281153.pdf
    • https://cdn.shopify.com/s/files/1/0438/5194/0000/files/88179765185.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/tetekaditik.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/big_bang_theory_roommate_agreement_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/45300277267.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0433/6972/6110/files/artificial_intelligence_in_medicine.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81159011373.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/94027116084.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_off00007989.bin
b3b72ba3d4cba0fd033ebd9ada0c31ae7702081d140eed0d4a7e24ba49cb8d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7989 5236 bytes
font_01_sfnt_off00008b2b.bin
c09d076e1c8f090f4eb9ebb48eca3a0d0e6930d48382abba73c8eee0a1fd63de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2B 9924 bytes

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