Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c08309fa5af4b6…

MALICIOUS

PDF

53.3 KB Created: 2020-08-23 12:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5553dfad763d5aaaa5648e6940abc2f5 SHA-1: be43c2febf4063c68a578d0d80bc1ebde67aef7a SHA-256: 81c08309fa5af4b656658f3384b706e227460571594604c3ef8a229dfa3fa2b9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is disguised as a crossword answer key. This link is likely intended to lead the user to a malicious site. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs.

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=new+york+times+crossword+answers+sunday
    • http://kigiwaka.dhammaforeveryone.com/uploads/1/3/1/4/131454012/najuxo-kuwepur-dufeje.pdf
    • https://cdn.shopify.com/s/files/1/0434/6799/7344/files/1908148757.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/tizixulurudol.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/indo_saracenic_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/43623482019.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/piano_songs_with_chords.pdf
    • https://cdn.shopify.com/s/files/1/0435/7193/7439/files/xelafidexerolukimumeniwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/jijadolimogupatutigobuja.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/64258363902.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/10077324228.pdf
    • https://cdn.shopify.com/s/files/1/0428/9993/1295/files/mumosaxalamexaguzoba.pdf
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/35418843005.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/60944850271.pdf
    • https://cdn.shopify.com/s/files/1/0441/2493/0200/files/domitelufedatawojifasaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/56119941878.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_off000091e2.bin
65225f3b0332d7bbafe718b99d4585493cfff4647652a9c69293c03a97b304c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E2 5280 bytes
font_01_sfnt_off0000a3dd.bin
51e99cb187bdae13ada4ead7d7e5e2758bf650147f1a9ab6ea55c51767063ffe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DD 10420 bytes

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