Malicious PDF — malware analysis report

Static analysis result for SHA-256 903104988bc53a45…

MALICIOUS

PDF

54.9 KB Created: 2020-07-24 21:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0327b59f067c3af6886bb1a5bf2f90 SHA-1: 0d4407a372918e65dc72f5210934228cfbf3eee6 SHA-256: 903104988bc53a4532f4c27ef3651141b32270cf51f08b4d1ae7c803fb899a7b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, suggests a lure related to job interview questions. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=list+of+job+interview+questions+and+answers
    • http://files.kidsoutdoorliving.com.au/uploads/1/3/0/7/130776166/gesezifa-belexevukukaz.pdf
    • http://files.sogo.cc/uploads/1/3/2/6/132683484/najodi_sufimajiduri_gotiseraminewux.pdf
    • http://files.larklandsroofing.co.uk/uploads/1/3/0/9/130969984/df42795d98.pdf
    • http://files.kidsoutdoorliving.com.au/uploads/1/3/0/7/130776166/gesezif
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/42389732850.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/gusasemubazakoti.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/nolozoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/bifiritipimubewumifake.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/96357828245.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/nopavatewuzigowakaxugojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/1314829929.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/89425818034.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/kaxivotupurojesiruzegogu.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_off00009a57.bin
eafb94a671e4ffd3186f5933d99a023c6d0cdfc16b7a75178691dcd64c2b4c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A57 5184 bytes
font_01_sfnt_off0000ac0c.bin
14f4507c45a07a86171c525e190b3646f9d331600a34d9bf566fbff6d4cbe9d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0C 10196 bytes

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