Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e04884915f74ba…

MALICIOUS

PDF

43.1 KB Created: 2020-09-08 04:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 442b6f2529a589b4b56adcccb5ecf6e1 SHA-1: a536a10b8a3277452002db8d7b9ea833044e7286 SHA-256: 77e04884915f74ba1782f25e73c1cad8526615e0fa677ab028f4bc56b2ba7e69
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=won%2527+t+back+down+song', which is flagged as malicious. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, potentially to distribute malware or phish users. No scripts were extracted, but the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/wix?keyword=won%2527+t+back+down+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/eddc50_d4e4cbd89f6749e98db9bc06946a5b43.pdf
    • https://static.usrfiles.com/ugd/f1780b_2e446a895ba94776992cd96eeeb2e6fa.pdf
    • https://static.usrfiles.com/ugd/2c8d66_fe1aee35041d4145ab1c0c6c81f5b9df.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4ef5ad615cc40d399cde0dc95359476.pdf
    • https://static.usrfiles.com/ugd/35e1ce_70c27387cb9a4bc68c482da9b2f90c21.pdf
    • https://static.usrfiles.com/ugd/cf14a4_9da19b31f05345b6ad55328bd6948088.pdf
    • https://static.usrfiles.com/ugd/824332_f78336baced74299bc95d18885274903.pdf
    • https://static.usrfiles.com/ugd/5b604d_e684ee515d5c467c83dde573df8f7590.pdf
    • https://static.usrfiles.com/ugd/b9801a_d34a0e9fba7843839a71b67f877e80c3.pdf
    • https://static.usrfiles.com/ugd/9f6a24_a08c421d919f46a68b6514d7a05145be.pdf
    • https://static.usrfiles.com/ugd/d902bb_570ccbb6fb14429998f1e9a0e069f69e.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_a74b7f68c178468b9f8a0c5caafebea2.pdf
    • https://static.usrfiles.com/ugd/83b1b3_5ed3328048d24c59b7e4d6cd1213c081.pdf
    • https://static.usrfiles.com/ugd/bb13a2_747d1b07686d43818b998bb5bbdb6bd5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4c5e787f2bd47cd926fb14535470c8c.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bc9.bin
b9442536674591264b0d488b1d3a6163e2162263dfafdda64d8379feed8bd342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC9 5320 bytes
font_01_sfnt_off00007e1c.bin
5db9e476f24fb85f81d6b1eb9318c39c283c78d335c3bfdd431bc814792f8e0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1C 9920 bytes

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