Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd8483302c5a347…

MALICIOUS

PDF

33.9 KB Created: 2020-08-30 17:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b399578a086440872d9548b67e075e8e SHA-1: 41a148686f51094fa5c62aed4181b69443016757 SHA-256: ddd8483302c5a347611962463afe2cd46a209321a752cea6ec4b60ed31fc12dc
150 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Amsco ap government and politics 201' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm further supports the malicious intent.

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.cc/wix?keyword=amsco+ap+government+and+politics+201
    • https://static.usrfiles.com/ugd/b8c837_05f556faa2e44eb1b0ffad865cd588e1.pdf
    • https://static.usrfiles.com/ugd/ca300b_d325dc803b634b1fbf1c473d3875b78a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fd0bdb4ea354122ab036d196f5a9c5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f6e0a5b89b14037a7c44b6d91043543.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b3f7c400671443ea9040182982921a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5d7dc1cfffc4c32bd88f0a002258f45.pdf
    • https://static.usrfiles.com/ugd/48d9a1_55c1361c32ce463d8cf5ea0a5398d153.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/nutuxo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/15101802428.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/fegirilulabiduxixixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9797/files/fresh_lasagna_sheets_iga.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_off00004540.bin
59dacaf25ec478ed5cc8657e98023f133848f81fd01712ff4c1ee377f39fbe0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4540 5768 bytes
font_01_sfnt_off000058d5.bin
142d59d19ffdcc60bb79c454ffbae57e3dc4433fff62539e1853ffe13f39aa1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D5 10008 bytes

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