Malicious PDF — malware analysis report

Static analysis result for SHA-256 8faa1e2872a2f16d…

MALICIOUS

PDF

121.0 KB Created: 2020-09-11 00:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13187d9e0e1c1bce42f7ce855b5c7a85 SHA-1: 6a2a54acc18b0634a007d88cf1ee2b3cb84bb983 SHA-256: 8faa1e2872a2f16dc4dd3e38882b6a9204af7849b472365db5c5ef89e77fbd36
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious links. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.com/wix?keyword=application+of+genetic+engineering+in+environment+pdf', is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=application+of+genetic+engineering+in+environment+pdf
    • http://files.evildragonfiretheater.com/uploads/1/3/0/9/130969424/967e30b25163c.pdf
    • http://files.en.halfhouse.org/uploads/1/3/1/1/131163945/juruxanosemix.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbd5105def9649e1a620f65a4156f451.pdf
    • https://static.usrfiles.com/ugd/b8c837_dccc252bc9b54ef0aefd27ea420dbcd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d88feceb1d34f07a902010f38dc25c3.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/robumawu.pdf
    • https://static.usrfiles.com/ugd/a58b01_1316800c0c894c6991e78c6fcf89ee44.pdf
    • https://static.usrfiles.com/ugd/b926a8_6110cb16820040ed9c37ae35acd6ddc7.pdf
    • https://static.usrfiles.com/ugd/06497e_f80d3feba1c24aed9add577109a9bc0e.pdf
    • https://static.usrfiles.com/ugd/4c3d6a_951d528e568d4b9eb5a1aec556c5d9f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_09a1505ba1864445ae4780b5e3ee6aca.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001928d.bin
9eee081e974c98b7c902fd713c4590c25feb2fb3aa7657b2e3ac64f91eca4172
pdf-font-stream PDF embedded font (sfnt) at offset 0x1928D 5136 bytes
font_01_sfnt_off0001a3e8.bin
cd2fe04cbc12c0de20f0f04bbf8ca2c0b9b8ff90e177933db93fbffd1b72485f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3E8 10512 bytes
font_02_sfnt_off0001c7f0.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7F0 4324 bytes