Malicious PDF — malware analysis report

Static analysis result for SHA-256 668eb49fd2b73e69…

MALICIOUS

PDF

45.8 KB Created: 2020-08-30 23:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31239d56e939f7b8a12d95a4ac1aa3fc SHA-1: b6f885e7a9e57a5b6bf9ea86cdeb862b9189bf51 SHA-256: 668eb49fd2b73e697aa9297116633db59f6aebb9540c13f054e873c1a21d6ca3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, masquerading as a workout routine, which is indicative of a link farm. One of the primary links, 'https://ttraff.ru/wix?keyword=ulisses+jr+ab+workout+routine', is flagged as a known malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ulisses+jr+ab+workout+routine
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/253000_fb4ad45012c14efbabf443e92c85e99e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3a080b41d5e40d0879a4276ef87e7a5.pdf
    • https://static.usrfiles.com/ugd/353d00_58d80d1205a0407c92a33e73c9973c41.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc22890e19354a8c95a814f9dc2f3ac0.pdf
    • https://static.usrfiles.com/ugd/e4ff69_9273b6eff6ab43bc819ca0f8b42aed0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba81411a5788433eb5a317c500da141c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ce17a5bc9894ade9b61c46011f498d2.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/jenness_state_beach_surf_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1304/files/36212740585.pdf
    • https://cdn.shopify.com/s/files/1/0433/7428/0855/files/14028509020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://static.usrfiles.com/ugd/93c935_f68ec968ad164f7eb2485c1c156fc5d3.pdf
    • https://static.usrfiles.com/ugd/e4ff69_7c44dea24e12461ab5e5ce9c9b8b9901.pdf
    • https://static.usrfiles.com/ugd/73c254_269797c179c14004ab111bde21003428.pdf
    • https://static.usrfiles.com/ugd/1a89c8_0a3decf36c844a0fbeceb03b7802dc27.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ce.bin
d6767309f721c5c028edebf15f025ef2862e5b5643345cae1207936f9e9dc478
pdf-font-stream PDF embedded font (sfnt) at offset 0x70CE 5044 bytes
font_01_sfnt_off00008218.bin
906441504e7e58da0b33f0b264e1d80533cc7f1967a2e02bbfbbfdb0f3d25fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8218 12868 bytes