Malicious PDF — malware analysis report

Static analysis result for SHA-256 803f34046e04447e…

MALICIOUS

PDF

64.8 KB Created: 2020-08-20 01:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b6e5f8e165a3ad09794eb91f74801a1 SHA-1: 62b6c250184e73fa65de1dbb041ee2268f623052 SHA-256: 803f34046e04447ecff19414463c61286b488e2fa1b0b07f119aa2d0a34fcf2a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains a heuristic firing for a malicious redirector link and a large number of external PDF links, suggesting a link farm for SEO manipulation or traffic redirection. The document also contains a lure to install a browser extension or update, a common social engineering tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=typing+lessons+practice+sheets, which is linked to a redirector.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=typing+lessons+practice+sheets
    • http://rowaw.theuniversalgospel.com/uploads/1/3/1/4/131407668/wukupajerofumisibamu.pdf
    • http://files.bandyphotos.com/uploads/1/3/2/6/132681352/wovebe-maletiwapowoba-temegim.pdf
    • http://files.eastcoastspeedwaytv.com/uploads/1/3/1/3/131379820/3789781.pdf
    • http://tigeje.mauiskydiving.info/uploads/1/3/0/7/130775075/pinutetowakukej_feropilini_pudisosakupukut.pdf
    • http://dezibe.mgmband.com/uploads/1/3/0/9/130970009/ce4bb41382c68.pdf
    • https://cdn.shopify.com/s/files/1/0431/2206/5557/files/4350444625.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/cambridge_advanced_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/9082/8700/files/acronis_data_recovery_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/26147084658.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/piwogiwilaxisev.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/76452714441.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1878/files/git_undo_add.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/disaster_risk_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/69145031512.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/20832568422.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1515/files/79837970734.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_off0000b2ee.bin
8709fc20ee4bf4e05900d8c258e010860600e745166b9bd1a414bd483e4100bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2EE 5032 bytes
font_01_sfnt_off0000c403.bin
a2c1cc8b3616698e6939eccf3ff9738beb5cce9270c6e403ff395e159eee21ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xC403 10420 bytes
font_02_sfnt_off0000e795.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 4324 bytes