Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9ed4aab06a713c…

MALICIOUS

PDF

58.6 KB Created: 2020-08-31 21:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e86f5c67745e5137ccf6bf74e0aa43d SHA-1: d3e39e767e7cfef63e3e712cd030d1a8c6361610 SHA-256: 1c9ed4aab06a713c8f86456c08a3ebabe06304a301c3c6eea7e89c8e458eeef8
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wix?keyword=government+guidelines+alcohol+consumption+uk. The document body, though heavily obfuscated, appears to contain text related to government guidelines and alcohol consumption, likely serving as a lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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.ru/wix?keyword=government+guidelines+alcohol+consumption+uk
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/49140281201.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/bollywood_film_dj_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/sql_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/5224/2856/files/sovoweze.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3280a7840346168bfa1539943b65ec.pdf
    • https://static.usrfiles.com/ugd/f55bec_a9ac87c22be143ebb1d95f529c7c9182.pdf
    • https://static.usrfiles.com/ugd/544c7e_42bee71d62a143e19d8dbf0701cb42a0.pdf
    • https://static.usrfiles.com/ugd/16a96a_b3d8c0b8ee694037b454b81dd41b716c.pdf
    • https://static.usrfiles.com/ugd/739437_85166eda5b5d4b268d2fda8b58147b76.pdf
    • https://cdn.shopify.com/s/files/1/0440/5359/4277/files/anthropometric_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/vector_canape_17.pdf
    • https://cdn.shopify.com/s/files/1/0450/9194/6661/files/how_to_make_a_file_on_windows.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2622/files/gikegumefavorarukonafox.pdf
    • https://static.usrfiles.com/ugd/c1615c_8334da43e4f0472dabbf8d8a388aba48.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ecce2c2441a42d0b8ca3ab46d43b0e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfa4bfd4d8014aec97212927136faeb3.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_off0000970d.bin
9f9d5dcaf09c1eaee52b0884a97903278f877f0605d323e29e71ac58c77e01fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x970D 5524 bytes
font_01_sfnt_off0000a9b6.bin
b23fa80ce3886aac8bae87d29b93bb4897494a86538d0b2637753c7d3998cc92
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B6 10972 bytes
font_02_sfnt_off0000cf39.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF39 4324 bytes