Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d0a786c8695200…

MALICIOUS

PDF

33.3 KB Created: 2020-08-29 03:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d36ff5b24a7738459c3e9bc9759c65c SHA-1: e402710b57280585a4a2e5876bdb8d73766e4f8a SHA-256: 12d0a786c8695200058db29f9b80f9e823b6d23b1198f9cb3b7a3c83fe540b6c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, 'https://ttraff.com/wix?keyword=bosch+classixx+6+1200+express+parts', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL. The presence of numerous external links, many pointing to PDF files, suggests a link farm or SEO poisoning tactic to distribute 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.com/wix?keyword=bosch+classixx+6+1200+express+parts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_46f6a3b0ad8842e9a77841f0ba807c20.pdf
    • https://static.usrfiles.com/ugd/b8c837_56e2a992cd1648e79a269c6445757132.pdf
    • https://static.usrfiles.com/ugd/b8c837_215ee62a3a1148b38f0730dcae6314dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2dadf8565b74eac89d806d0b8fb657c.pdf
    • https://static.usrfiles.com/ugd/b8c837_da33659d42c143039cdf1ef802bab706.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/sintomas_influenza_estacional_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0434/7147/0742/files/68138941487.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/bmw_troubleshooting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/minecraft_fallout_maps.pdf
    • https://static.usrfiles.com/ugd/b8c837_1008a45593a0482ba727a4884fcec52b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3298a38d1344a948ab5f66ce293a1b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_341c009ad4dc49fa968a60bcb5cf96e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60a33eac6584991969a75197cdb0190.pdf
    • https://cdn.shopify.com/s/files/1/0435/0056/8736/files/frp_bypass_apk_lg_aristo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/47635099893.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_off00004339.bin
857abdb1ec3f43f8dc46f6474b3b257faf2b922b508eb7cc9d990490cc78b7d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4339 5620 bytes
font_01_sfnt_off00005653.bin
8dbdaa8ef50cd6c0c5c5f85498c3131c7cc826884987727ce89d087af564d53d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5653 10324 bytes