Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0cfd3f3d34a9dc…

MALICIOUS

PDF

58.2 KB Created: 2020-09-07 05:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 190cbcb1df872d438eb3df4c363feb99 SHA-1: 0bed5f53acdeb5595ce85b62a6ebe0e6f44f3f39 SHA-256: 5a0cfd3f3d34a9dcb8eaff808f7a135ed490000fb9eb37fd1cb0616ea7a75686
140 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by a PDF link farm heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=contract+for+payment+of+services+template', indicating a lure to external content. The presence of multiple embedded links suggests an attempt to distribute or phish via these external resources.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.link/wix?keyword=contract+for+payment+of+services+template
    • https://static.usrfiles.com/ugd/d1c05f_eebfef4631f84fc29753e672133c560e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c087e9e525c44f28e53475af7b71141.pdf
    • https://static.usrfiles.com/ugd/04e6f9_bd78cbe190b24f72a34b5d53da538643.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/87515570620.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/vevoterixizeneperasapu.pdf
    • https://static.usrfiles.com/ugd/027f51_d4757e42cda1473eb05bfc61a142d31f.pdf
    • https://static.usrfiles.com/ugd/c75f60_5f6e01283c834d228fd39dbcb4067b9c.pdf
    • https://static.usrfiles.com/ugd/9eb187_6fdac734a0714284bbbd44193959a39e.pdf
    • https://static.usrfiles.com/ugd/0dd040_5440a984586a427ebd8d132b56bc915e.pdf
    • https://cdn.shopify.com/s/files/1/0437/3315/6001/files/adjective_and_adverb_worksheets_for_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0462/3764/7002/files/nero_2017_classic.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4124/files/exercise_past_simple_present_perfect.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_off0000a2a2.bin
8533134081fb6d317c0253885531ee7e2770ba789b5b6e64105bb32b92cbfd1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A2 5228 bytes
font_01_sfnt_off0000b464.bin
b690da357304d04d3d0b0dcf03da0bd3db955e75ab55ab99ac059c32c78401ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB464 12248 bytes

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