Malicious PDF — malware analysis report

Static analysis result for SHA-256 830e5ee1ddad1b1d…

MALICIOUS

PDF

39.8 KB Created: 2020-09-04 23:38:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f15a6e8deb1a452360ea40ee2ec98a4 SHA-1: 7ff3924472906611ae66f0b07692bcd518f325de SHA-256: 830e5ee1ddad1b1d8492cc792b0566a5d9a36fd1027d32b09144a6bfad23562a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.club, which is likely used to redirect users to further malicious content.

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=arsenal+military+academy+subtitle
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f5d37feffc15469badd09f3a45dd958d.pdf
    • https://static.usrfiles.com/ugd/963627_b28d65e7838640928a02a825542b4450.pdf
    • https://static.usrfiles.com/ugd/6cf392_7da2681a49df4a12b24ef6be3b2561bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2b96ae9efea49cda02753a74a29d5b9.pdf
    • https://static.usrfiles.com/ugd/9d7ad9_f11e4137f9574ffea0ebe20bf216fabb.pdf
    • https://static.usrfiles.com/ugd/c75f60_ec0e7680a809453eba60f9ecf193d263.pdf
    • https://static.usrfiles.com/ugd/628a76_7328bc51b7f142dfb790702c33a03e56.pdf
    • https://static.usrfiles.com/ugd/39cb9d_d92e130d8db64b8482c8b733024dee83.pdf
    • https://static.usrfiles.com/ugd/bcc0e4_60097305facf45fa98cf696fa9138cf1.pdf
    • https://static.usrfiles.com/ugd/d902bb_344851f27e0049e5a2878ea546dc8e56.pdf
    • https://static.usrfiles.com/ugd/e5a943_48ec9ffd6ea0415d92f54112a1f5c6ee.pdf
    • https://static.usrfiles.com/ugd/429b25_5d17669aad1a40fda4d9d3cfa6cb59d2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004eee.bin
22ddd0a6a129424b4f1442ce13968f749529d623b54e2fabc0b546062dc79df0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEE 4000 bytes
font_01_sfnt_off00005d13.bin
a46ef0d890e14df75ab34e497ba529585a3445e8285ed6eb829afe94c2316e97
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 5316 bytes
font_02_sfnt_off00006f11.bin
556b4f441c685fe500bf13e52824c9b330f007415743b938d4cefba23e17b762
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F11 10472 bytes