Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a07acc7047d891…

MALICIOUS

PDF

43.3 KB Created: 2020-08-15 03:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a8e9106a3a6f3b64f28a66a000e29d5 SHA-1: 619b2a4d885ab136d4533b0723a200e4c96bf51a SHA-256: 44a07acc7047d891d784be640d09543f3b86cfae21e243f94b62b5b263ad0526
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=numbers+to+100+in+french+worksheet'. Another critical heuristic flagged the document as a link farm, containing 16 external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains a reference to the malicious URL.

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=numbers+to+100+in+french+worksheet
    • http://viveji.ronsgameroom.com/uploads/1/3/1/0/131070859/koribujodolomar-lixinone-zegeli.pdf
    • http://loruk.souliciouslifestyle.com/uploads/1/3/0/9/130969465/jadar.pdf
    • http://jufozoz.managingupset.com/uploads/1/3/1/3/131381464/33a2e87.pdf
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/a_journey_through_anglo_american_literature_answer_key_module_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/2766/0951/files/free_online_bollywood_movies_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1183/files/95464962304.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/iteration_of_rational_functions.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/1099273544.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/patofisiologi_jantung_koroner.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/python_graphical_user_interface.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/berlin_definition_of_ards.pdf
    • https://cdn.shopify.com/s/files/1/0435/5748/6753/files/ruby_on_rails_syntax_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/panovel.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/nujafenuwinux.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/tuwutal.pdf
    • https://cdn.shopify.com/s/files/1/0435/1403/6383/files/35494227280.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_off00006a8d.bin
536fde3c21f83ef9892b5c4108392d71595301ca95fa918a23cf9adc74423dea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8D 5336 bytes
font_01_sfnt_off00007caa.bin
ac654e39eaedf1ce96b6c995a64e997329438ed9a37488a9c573ca62c31a1141
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAA 10380 bytes