Malicious PDF — malware analysis report

Static analysis result for SHA-256 20420a6cdefef76e…

MALICIOUS

PDF

46.8 KB Created: 2020-09-06 15:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74d8f70fd59d08f51e9cc6ced133c30b SHA-1: 7c498538526f5639e019e44f0fde48177e962ada SHA-256: 20420a6cdefef76e51dae388bac1a14eaf937e5b28a3bc6507cb99945569c3fd
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL that likely serves as the lure. No scripts were extracted, but the presence of multiple external links suggests a delivery mechanism focused on redirecting the user to a compromised or malicious site.

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.link/wix?keyword=phonetic+alphabet+for+english+pronunciation+pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/14755066725.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/renewable_energy_sources_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/xabivebusodapidirexi.pdf
    • https://static.usrfiles.com/ugd/67f5f7_6a23a24343504adbbf7417eedd50fc0b.pdf
    • https://static.usrfiles.com/ugd/229b11_675db47afa404966a4a63f4e81009594.pdf
    • https://static.usrfiles.com/ugd/0baf77_70486532cbc64b7aa50704082fbd2915.pdf
    • https://static.usrfiles.com/ugd/3c9ac1_56ca49db1b75417da5173cec1b592b16.pdf
    • https://static.usrfiles.com/ugd/40b9e6_713c785e0ebc4fe0bc5e611f34b427c2.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/darrell_sheets_new_wife.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/35917299790.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/blair_singer_little_voice_mastery_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2589/1479/files/cat_s_eye_margaret_atwood_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8428/3033/files/73278184876.pdf
    • https://cdn.shopify.com/s/files/1/0468/8320/9373/files/moruwomo.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_off0000780a.bin
7fba3c3ed8ae89daa52d51919a8fd605f8175a43e9cc699f913894aec7f5bd8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780A 5556 bytes
font_01_sfnt_off00008ae0.bin
a857b917a00f6bc0b4d9dca959a5574b5e78fcb36325e53fce7c05caa6bfce77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE0 10308 bytes

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