Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6f599ca8ae3476…

MALICIOUS

PDF

80.2 KB Created: 2020-08-22 02:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08d644420663ebeb10ab08c05a56c4df SHA-1: a89852a10816164f0b0db92b88e9e3b5964c6b00 SHA-256: 2a6f599ca8ae34760973a7ca868af70a4d4ff69ad091015d3da3ef5384bab351
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading 'Python 3.7.0 32-bit'. The presence of a 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic firing and the embedded URL strongly suggest a phishing or redirection attack. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic to bypass gateway security by suggesting a password for an encrypted archive, further supporting a malicious intent.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=python+3.+7+0+32+bit
    • http://files.trendytutusbylauren.com/uploads/1/3/2/6/132683014/rafesive.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/sosanu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/10319380809.pdf
    • https://cdn.shopify.com/s/files/1/0437/7529/5640/files/college_physics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/notasolubosojemagedebafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/world_cup_time_table_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/77490710204.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/usmle_case_files_emergency_medicine.pdf
    • https://cdn.shopify.com/s/files/1/0429/0120/9251/files/95058298421.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/rovaduzepetinekuvok.pdf
    • https://cdn.shopify.com/s/files/1/0454/5331/2150/files/vijopewesegalexep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70745323757.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/10503190167.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f275.bin
1c099cb35ac5973ecac64cc87da66ec9262bee457ca4ca47bca864cf9b9bcc10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 5052 bytes
font_01_sfnt_off000103b9.bin
27ce0e078973e328390b62038627cacc9011dbb94e3db0edbb6ae3a2a6531d41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B9 15476 bytes

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