Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6294836c659c59…

MALICIOUS

PDF

55.1 KB Created: 2020-08-20 04:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ce676f20fc83838734b3be8c0821749 SHA-1: 64bbc0ee1fec381a5986fdd01500460c0d34ef31 SHA-256: 9f6294836c659c59e642f46b83c839681ed04eb0a68d11b09b28a8764f7570be
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is a known malicious domain. The document body, though heavily obfuscated, contains the same URL. This suggests the primary intent is to lure the user to a malicious site. The PDF also contains a large number of external links, many pointing to Shopify, likely as part of a link farm to improve SEO for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=relative+frequency+and+experimental+probability+worksheet
    • http://files.sanmarinogirlscouts.com/uploads/1/3/0/8/130873810/8530676.pdf
    • http://files.parlapianostudio.com/uploads/1/3/2/3/132302710/6560971.pdf
    • http://files.gracebaptistlynden.com/uploads/1/3/2/6/132681296/zuripijewoliwoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/management_13th_edition_schermerhorn_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6537/5908/files/20144126205.pdf
    • https://cdn.shopify.com/s/files/1/0436/5657/7182/files/dragon_ball_shin_game_ppsspp.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/silk_reeling_machine.pdf
    • https://cdn.shopify.com/s/files/1/0462/7936/0661/files/weather_network_allergy_report_ottawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/string_theory_david_foster_wallace.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/java_max_integer.pdf
    • https://cdn.shopify.com/s/files/1/0437/0278/0072/files/adeptus_astartes_codex_8th.pdf
    • https://cdn.shopify.com/s/files/1/0434/0079/0170/files/katekotefazujawimumidopiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/mathematical_statistics_with_applications_solutions_wackerly.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/
    • https://cdn.shopify.com/s/files/1/0431/46

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c8f.bin
19727143d73939cb8fd53ebe40d801bdc19f14ddb3cf750e90ed13eb9ebcf65e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8F 6052 bytes
font_01_sfnt_off0000a11c.bin
4711b4660066e594513bc1db9232d7d647b5938740d3560ecb7a4256bae1e2bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA11C 14636 bytes

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