Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa6f001ff13ca3c…

MALICIOUS

PDF

118.1 KB Created: 2020-08-11 15:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a64fbe1037f1dc61c5aac248b9c87a3 SHA-1: c4af430868d808d62041f346f78d17fa86b2b94c SHA-256: 8fa6f001ff13ca3c0368e5fa7c7b52acf57096289bf5feb06be39a7e2eb7925c
120 Risk Score

Malware Insights

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

The PDF contains numerous links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=occupational%20safety%20definition%20pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The file is a PDF generated by wkhtmltopdf, which can be abused to host malicious content.

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.cc/wb?keyword=occupational%20safety%20definition%20pdf
    • http://files.spamitzvah.com/uploads/1/3/1/3/131398380/2d72c4eb7.pdf
    • http://files.elderplanning101.com/uploads/1/3/2/6/132682833/dotobodosuniw.pdf
    • http://files.westandpure.com/uploads/1/3/1/4/131454012/4f175f3ce3fbc01.pdf
    • http://nunug.theartexchange.ca/uploads/1/3/1/4/131437423/dofikiwivetep-gitixol.pdf
    • http://files.thelastnightofmytwenties.com/uploads/1/3/1/0/131070374/fowidapixapo_gufozigime.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/samuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/0549/9803/files/40165601187.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/calligraphy_practice_paper.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/red_cross_lifeguard_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/59999798535.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/10112514325.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/31486703209.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/administracion_de_recursos_humanos_r._wayne_mondy.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/84166354417.pdf
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/34557512245.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/dutowikume.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_off00017910.bin
76098c51392e31cd59c6da36add4520555288703ee1c6f89a65e9a676048c40f
pdf-font-stream PDF embedded font (sfnt) at offset 0x17910 8056 bytes
font_01_sfnt_off000193da.bin
8263cae1222e8b5f8aae5060abf9e1cbe9d6a7f5291ab169c00a07539b480e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x193DA 5184 bytes
font_02_sfnt_off0001a598.bin
b20721b2ab03df47423452d96607ddc63b02d449105f1f90bdd53db4f6aa0b58
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A598 10924 bytes