Malicious PDF — malware analysis report

Static analysis result for SHA-256 422477eed67ec580…

MALICIOUS

PDF

47.1 KB Created: 2020-08-24 04:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fbff5ade3ab2446cf584e98e55bea7d SHA-1: 0aaad7eb1c7ee79ff2a94dd349290188638676a3 SHA-256: 422477eed67ec58097c5517392076a1facfff5f2044746cb89e8348171291a4b
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=camtasia+assets++free'. It also exhibits a PDF link farm, with numerous links pointing to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure for potentially malicious content. The combination of these factors indicates a phishing or redirection attack.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=camtasia+assets++free
    • http://sejumu.freebirdok.com/uploads/1/3/2/6/132682883/gonufiled_rivuko_gopazesugibaku_rinanefozenu.pdf
    • http://files.chrissyandlee.com/uploads/1/3/0/8/130814515/2470298.pdf
    • http://bowupunuj.rn-cpworld.com/uploads/1/3/1/0/131071164/15673.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/mitumuribam.pdf
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/41913747942.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/fadelov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/gaxetatasonudebofefaluv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/soxanekaseterotaneke.pdf
    • https://cdn.shopify.com/s/files/1/0450/2405/1358/files/luloxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/sony_dvp-_cx995v.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/biology_chapter_wise_questions_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0437/8322/5506/files/lunowoguve.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_off00007b05.bin
7de7b9a6d3717ddbf138146447b88d55bde0aba7a407480ba5032d8b2771d4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B05 4788 bytes
font_01_sfnt_off00008b31.bin
3f0f397dffb48fe2d7bc13b83e4266c0653fcaf8768424f499fbe473401b2344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B31 10628 bytes

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