Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d1c86a478e7cde…

MALICIOUS

PDF

46.6 KB Created: 2020-08-29 23:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffd8ec0c25412ed1b8ec82c308b1639a SHA-1: 1e4d4142cc105de2456f61e315e01ec0071a4eaa SHA-256: 55d1c86a478e7cde889b49f09bd09e464dc0ddcee30176d3df891c113d707694
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, with the primary heuristic identifying it as a PDF link farm. One of these links, 'https://ttraff.ru/wix?keyword=2d+shapes+worksheet+ks2', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a coordinated effort to distribute malicious content through seemingly benign documents.

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=2d+shapes+worksheet+ks2
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/gibedumalugu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/the_scientist_and_engineers_guide_t.pdf
    • https://cdn.shopify.com/s/files/1/0428/9472/1187/files/12321535700.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/41486204750.pdf
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/vebebimedakiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/business_letter_writing_skills.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/beowulf_poem_modern_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8988/files/data_science_statistics_interview_questions_and_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_39d35689cf7343b5be459bd2bf20f237.pdf
    • https://static.usrfiles.com/ugd/3cb679_cc6e89dcbed24f1daf25778e09295c2c.pdf
    • https://static.usrfiles.com/ugd/158fb9_d9878a34f32e4c58b896e3d31d9be22f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b357fa2a0f574671951ae85840c679e9.pdf
    • https://static.usrfiles.com/ugd/de3d83_817b5cc926fa46d9a332544c167f7cf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9f61959076245ed9fa00c96a6d56967.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d1f4062f4564fcf9ee63f59a0a84290.pdf
    • https://static.usrfiles.com/ugd/36f25b_1463b7a0330e4e44bf65b4a1048dde39.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_off00006ae5.bin
352014e1986b05a1495590146d2f63f5aa88cea7ca89e21a7d99eed557c8090c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE5 4844 bytes
font_01_sfnt_off00007b79.bin
15cc820b46bf3494d8c94fe857d47f76933812afbdbc1424dd6897774ad90708
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B79 10556 bytes
font_02_sfnt_off00009e4e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4E 4324 bytes