Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f94f91384fbebb…

MALICIOUS

PDF

36.3 KB Created: 2020-08-21 01:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 491c4b1731c5c80ee528ac8e75663f4d SHA-1: cf44de159093b3d75f6080b48336c71e8b798700 SHA-256: f2f94f91384fbebb6a9f1dbf6cbfceff477097b5811f6c9ed843cbc4bd639f59
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=champagne+colored+semi+formal+dresses'. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting the primary purpose is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=champagne+colored+semi+formal+dresses
    • http://wezukodot.countrypinedesigns.com/uploads/1/3/1/3/131398091/74d713d.pdf
    • http://files.littlebitsofhawaii.com/uploads/1/3/0/8/130874583/lilenuwexibalow-titobajige-bitolomomifa-mopegogitarilus.pdf
    • http://files.ocatilloaudiovisual.com/uploads/1/3/1/3/131384660/7673923.pdf
    • http://files.rawearth.ca/uploads/1/3/0/7/130776645/jaropanum.pdf
    • http://files.prairiedogpottery.ca/uploads/1/3/2/6/132682076/80456802629f5.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/vabomexisulegedoduwevij.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/creative_resume_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1126/files/lulimik.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/wibeluwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/jijisezopeboto.pdf
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/environment_impact_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/51334071267.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3415/files/submarine_refrigeration_and_air-_conditioning_systems.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6384338271.pdf
    • https://cdn.shopify.com/s/files/1/0447/0842/9977/files/o_crebro_humano_suas_capacidades_e_funes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/45818206945.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_off0000516c.bin
e12191a803a9a44b09c714d246c2c1db53a24f18741f99338c0615572ec23475
pdf-font-stream PDF embedded font (sfnt) at offset 0x516C 5476 bytes
font_01_sfnt_off000063da.bin
b09b37b0d5c1c1cd1fcbea0e0bac2cb0e56185bf36bb551e4d75c67fd40cfb0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DA 9416 bytes