Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1e7bb29685d7e9…

MALICIOUS

PDF

49.6 KB Created: 2020-08-30 05:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35c84b420b776ff41d9ff81b13e46069 SHA-1: 1d0a5ea2ffedd5f3458acfbf673b0d2ce0e9687e SHA-256: 3e1e7bb29685d7e9d112ee6df25c7aecadc18a7fa1c032d4b94acd2794c2953c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body itself contains the same lure as the malicious link, suggesting a social engineering attempt to trick the user into clicking the link. The presence of numerous other PDF links, many pointing to static.usrfiles.com, indicates a link farm designed to improve search engine ranking for the lure, further supporting the social engineering aspect.

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.cc/wix?keyword=Cardi+B+Vendeu+sua+alma+ao+diabo
    • https://static.usrfiles.com/ugd/0049ca_5dadbb9b491d44f9a10ae037676c49ac.pdf
    • https://static.usrfiles.com/ugd/9e14ca_c8ed3992ebeb4d239cb5be35e98db204.pdf
    • https://static.usrfiles.com/ugd/4d6844_cb36ae1646e94987a0b345df79253bce.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/kudujamerumevob.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/14497480977.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/7847924712.pdf
    • https://static.usrfiles.com/ugd/d2751c_438fe15afe6c4fbeb93b2cd23be6c07a.pdf
    • https://static.usrfiles.com/ugd/e643da_87f0eada18094001be4bf888053d3ab3.pdf
    • https://static.usrfiles.com/ugd/9e14ca_57b8e543e9644ac0a13b078801679c04.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_414f74f557c445e3ae49bfba561d6fd9.pdf
    • https://static.usrfiles.com/ugd/97493d_110759cae73f4e078f66b7392368d8e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a0317f12b2444569d04c126c18647dd.pdf
    • https://static.usrfiles.com/ugd/10e3af_a1773b22fb0b409790882a73a42c2d74.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_off00007252.bin
94a8d914f7ac4915ffa2b0514d97fd5b9b9f392f098b9187718ae1d974c6effd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7252 5140 bytes
font_01_sfnt_off000083ad.bin
2eaf2f22de569aff89b352b53e61ff2c3a5172872d65ba97439770fc948ff861
pdf-font-stream PDF embedded font (sfnt) at offset 0x83AD 12704 bytes
font_02_sfnt_off0000a9da.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DA 4324 bytes