Malicious PDF — malware analysis report

Static analysis result for SHA-256 a083ea82ad42028a…

MALICIOUS

PDF

56.5 KB Created: 2020-09-08 09:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03b04ff8db18659c1a8105244826ff14 SHA-1: be0c5e29f6bb435ac2aa14809ba90ccd0801e3f0 SHA-256: a083ea82ad42028ab98c4f69b8eed01d969cfb53c4c919ea08c04f78d1a7ba41
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=beautiful+carole+king+piano+sheet+music'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains references to the malicious URL and benign-looking PDF links, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=beautiful+carole+king+piano+sheet+music
    • https://cdn.shopify.com/s/files/1/0448/4271/3249/files/nursing_interview_questions_answers_and_tips.pdf
    • https://cdn.shopify.com/s/files/1/0431/9336/8725/files/sokojikuzuwuwadugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/gintama_rumble_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/fizebofixozamek.pdf
    • https://cdn.shopify.com/s/files/1/0434/7383/0048/files/nawokagunisaporakaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6076/4576/files/tn_12th_maths_formulas_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/hyperbole_and_a_half_unfortunate_situations.pdf
    • https://static.usrfiles.com/ugd/b8c837_a322527bd40c4432be99b75aae917238.pdf
    • https://static.usrfiles.com/ugd/a58502_af9edeb5168942ea8dd0335bde8f3b14.pdf
    • https://static.usrfiles.com/ugd/18574e_516f90852c924459a3ab21371cd9f4a2.pdf
    • https://static.usrfiles.com/ugd/834936_fd01bc7cc66f4f43aaceb9e2cfbfe322.pdf
    • https://static.usrfiles.com/ugd/2c608b_fa353d8151cc493cbfa869775b29a3d7.pdf
    • https://static.usrfiles.com/ugd/bb3bf9_821d928fd09c41268c00df85e9520d68.pdf
    • https://static.usrfiles.com/ugd/69695d_afed271db7a34519aca314d1a9c99d65.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000756f.bin
d8ee30acf500df65957978862f94a1a843d2829f7f77a74c6b1c2226f5ffb4ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x756F 5540 bytes
font_01_sfnt_off00008828.bin
98fe00924cb5844f3b403dc45bf6c11dd1d9409c1f03735f6e7bc88c6ad82e9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8828 17208 bytes
font_02_sfnt_off0000bddd.bin
73e2bae015806fcbcea00a5e77fef36cf57312733aebee32ba98308b5ce41d75
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDD 16120 bytes