Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e61f68302e7d04…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 11:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73ab1dbf12a1a5f1ab27d0ce174de61f SHA-1: 0e16e62d59d68a4712dfeebafdc706b00032a8f7 SHA-256: 90e61f68302e7d04d64f9498b434a69e835ccb3be0dbce4d0f494808892c21ed
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious URL, disguised with a keyword suggesting a legitimate download. The PDF also hosts a large number of other links, many of which point to Shopify domains, likely as part of an SEO link farm to obscure the malicious redirector. The document body is heavily obfuscated, but the presence of the malicious redirector URL is the primary indicator of 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/wix?keyword=gym+exercise+download
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/biofinity_toric_rebate_2018.pdf
    • https://cdn.shopify.com/s/files/1/0459/9808/0157/files/tugoxuxenigide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/42033445744.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/kowavaxakiwewikebi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0341/9556/files/37248082928.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/irc_for_textbooks.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/us_history_textbook_anthem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2077/files/38646532223.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1063/files/passive_voice_modal_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8563/files/97890667592.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/pulawumerozuxofezodirin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/9786125741.pdf
    • https://cdn.shopify.com/s/files/1/0434/7556/6749/files/positivist_approach_to_research.pdf
    • https://cdn.shopify.com/s/files/1/0440/9291/5864/files/scope_of_business_policy.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/71843898253.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_off0000641e.bin
58de9ac511ba488995e0f9d2e6895bde0a81199cc2b72f6f4c6852c0173dad1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 5380 bytes
font_01_sfnt_off00007675.bin
248974fff8a8ecf27646b1d38a398df613a555443b13547aecc68669bbbca017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7675 10424 bytes

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