Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e9c6b3ca7e51fb…

MALICIOUS

PDF

46.8 KB Created: 2020-08-08 23:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6964517128d8fcb27dbc18cc3f2004bb SHA-1: b692ac4960dada3afe5c4c7e1751aa92b85bb804 SHA-256: b3e9c6b3ca7e51fb3c556fc538ba46427ea63522d8f5434755b39b19c7c6cda7
120 Risk Score

Malware Insights

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

The PDF contains a link farm with 16 external PDF links, many of which point to shopify.com. One of the primary links, however, directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of obfuscated text and metadata from wkhtmltopdf further supports a malicious intent.

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/wb?keyword=baldassare%20castiglione%20book%20of%20the%20courtier%20pdf
    • http://files.hgbrga.com/uploads/1/3/1/0/131070398/namotigadososedulol.pdf
    • http://files.cgfcjesusislord.org/uploads/1/3/1/0/131069934/5500180.pdf
    • http://voweso.total-insurancesolutions.com/uploads/1/3/0/8/130813108/8294584.pdf
    • http://files.paradigmshiftedu.com/uploads/1/3/0/7/130775448/24705.pdf
    • http://files.wilestyle.com/uploads/1/3/1/4/131482939/gubokizirubimup-nimojeron-pigubisikobatez.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/80413653595.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/65141289695.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/wiwulovididodemidin.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/19050873621.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/nogediguwexutopow.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/attestation_d_employeur_destine_ple_emploi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4354/4488/files/aircraft_maintenance_programme.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/veparuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/atencion_alternante.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/33863956830.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/4540922987.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_off00006a07.bin
fb0314b64ca94f1c88cf651e2d6ac29a580689abfc8707d4ed7b38ae76e5680f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A07 5552 bytes
font_01_sfnt_off00007cd6.bin
6af73c60ed7b6a56ed05fc1885588a3c8daad8326331e81df98ff105d48ddee9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD6 10424 bytes
font_02_sfnt_off0000a027.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA027 4324 bytes