Malicious PDF — malware analysis report

Static analysis result for SHA-256 75843320201b5207…

MALICIOUS

PDF

36.6 KB Created: 2020-09-02 18:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e3fc800a6930c300d07701feffb2cef SHA-1: d221100b3b5ceac3d582192111cfe9571384dab8 SHA-256: 75843320201b52074de98245ae143cd0b944f4b99b021309750b66eb156c50ea
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, including one pointing to a known malicious redirector at `https://ttraff.cc/wix?keyword=jsw+energy+limited+annual+report+2018-+19`. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

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.cc/wix?keyword=jsw+energy+limited+annual+report+2018-+19
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/87a178_d15bd80cb62f45c0b0d3be12734ff128.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_fc2e535c8f7b489587a7341bd37b094b.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_030117beba754eb3b40488d3085b2fa2.pdf
    • https://static.usrfiles.com/ugd/ca32a8_afb84ea5829d44c8b738076a744c1d35.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d9675f563224ab69ed4d3e2331969bb.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/tojajeri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.pdf
    • https://static.usrfiles.com/ugd/5899d5_b01e7feda071408c98449f2e0f233174.pdf
    • https://static.usrfiles.com/ugd/ed64d2_19e1932c10d7452099560fccb48ff351.pdf
    • https://static.usrfiles.com/ugd/6350c7_eaf6935eb40d4ed7b89132c6582007ef.pdf
    • https://static.usrfiles.com/ugd/ca300b_52f30465a35f492ebb1132a692d4fb4f.pdf
    • https://static.usrfiles.com/ugd/b48b60_1fd138da2c7343db9002797da03911ca.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/10549794229.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6924/files/97236000197.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_off00004e29.bin
269ad09b05a133f7072ff471ad6b1a2b990c7ade27119e455275fef89bec968e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E29 6172 bytes
font_01_sfnt_off00006328.bin
a2fa95357861f59b23763b472496e30b852b6c4fa4dc1b0b4953b3782c7c20a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6328 10076 bytes