Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5f1e26fb6f22ff…

MALICIOUS

PDF

46.0 KB Created: 2020-08-16 10:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bb993be8eb2ec8ce844fb355c375544 SHA-1: 8e0ae9fb73a0c67be87d703245c41c378b32c175 SHA-256: fd5f1e26fb6f22ffc311f72fc2be99f3dfd36586e7d780a4eff9fa39a4b3a542
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, disguised with a seemingly benign keyword related to educational materials. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The file also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent appears to be redirection.

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/pify?keyword=daily+5+lesson+plan+template+kindergarten
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdf
    • http://files.todaysteachingtools.com/uploads/1/3/0/7/130776714/6503567.pdf
    • http://files.actacoustics.co.uk/uploads/1/3/1/1/131163788/nitogozemux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/mulopibogebogonom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/xipetijofixoxuvibavufub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5762/files/27572184984.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/2020_calendar_week_wise.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/evowars._io_mod_level.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1341/files/ketaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/kutujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8190/files/13787749388.pdf
    • https://cdn.shopify.com/s/files/1/0434/9906/1408/files/git_rename_branch_local_and_remote.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/psychology_quotes_about_love.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_off000075cc.bin
731901bf3d3c17fbedd231c59baa262e2a715be9bd0c2faab108d4eae5d1b30f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CC 5568 bytes
font_01_sfnt_off000088b4.bin
df10bebe0acd4206655bae09f56ad30dd42ce929d5d2cde355d4e13d70796c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B4 10176 bytes

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