Malicious PDF — malware analysis report

Static analysis result for SHA-256 f961a38f3786d380…

MALICIOUS

PDF

38.9 KB Created: 2020-08-15 03:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93c5a145dfb6e1dbefacc31e9ba2ee69 SHA-1: b09b00cd02e88f2aa0b3cd12bbcbb7c76f523f52 SHA-256: f961a38f3786d3802472e56cc4279f6c72f2b94b4c7d18a6e84ddff00aa09508
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as the initial stage for delivering further malicious content. The document body, though heavily obfuscated, contains a reference to the same redirector URL, reinforcing its malicious intent. No scripts were extracted, and the primary attack vector appears to be the manipulation of search results or the redirection to malicious sites via the embedded links.

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=amplifier+circuit+diagram+1000w+pdf
    • http://woxeke.chipperstreats.com/uploads/1/3/0/8/130813547/xenipeku.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/kowuworesalalavu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/18221927212.pdf
    • https://cdn.shopify.com/s/files/1/0432/4691/1643/files/25834871516.pdf
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/axial_skeleton_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/asatru_bible.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/pedake.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/3052942382.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/88818189669.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/hyde_s_secret_nightmare.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/possessive_pronouns_worksheets_for_grade_6.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_off00005939.bin
02fc80c8b80cb1863a33a42a77ebde0b6fe22e66e34e24617c681853c1dd7930		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5939 5572 bytes
font_01_sfnt_off00006c27.bin
18a52c84434b988df0dd6f0e14fd120106fb3c6d2cc2c45d235ff374696496aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C27 10284 bytes

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