Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6cc114efdebfa3…

MALICIOUS

PDF

73.6 KB Created: 2020-09-01 20:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce2877b445e3a2fd1a2db69907f8890a SHA-1: 0347484d5335877bf14c9ed2a6c96e258fed37c3 SHA-256: 7d6cc114efdebfa3209b0973f98cb33964db7fc267a2a6bf13141662bbc2b1cf
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a malicious redirector URL. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick the user into visiting a potentially harmful site. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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.me/wix?keyword=balsanskar+marathi+pdf
    • https://static.usrfiles.com/ugd/f3ecbe_48b5aa437e324d92a0cf3f2e923c53a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_acbe67c5670a45ecb7dbe5837abaf431.pdf
    • https://static.usrfiles.com/ugd/43d598_346c51631336481e924e4ce9f03093ef.pdf
    • https://static.usrfiles.com/ugd/451461_537c8383e5f44b79b68c704c8e584924.pdf
    • https://static.usrfiles.com/ugd/01e791_8f726bda4eb24e1f96b203c5b9f715b6.pdf
    • https://static.usrfiles.com/ugd/384ea4_310f01a0bbcd4e25b5351b722b6445f0.pdf
    • https://static.usrfiles.com/ugd/defdb4_2a828f50fd9b4647a768e8534273789a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5f0a7616f2c4122a05a0dc4150c0a8c.pdf
    • https://static.usrfiles.com/ugd/3aee12_f8d94c5a202b4eaebdc1a897a26851b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f1532a2c80a424cbfe51b4caba5ce6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6eba044e763446e97e044e59ea99c06.pdf
    • https://static.usrfiles.com/ugd/269bb8_6e4d32d50880435d845351d0b8b7166b.pdf
    • https://static.usrfiles.com/ugd/b7ab08_25c82fbcd433477bbd0d135000ca3677.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dac6d33d23745beac1c2bc26ccdf979.pdf
    • https://static.usrfiles.com/ugd/0049ca_86d45ffdda8f4de79f0d3e71c1f1cfab.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f1.bin
f44344a0d7e4126742b8770ab2d1dc7c3083dec3224fbc8f1d2ddd350b721631
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F1 5396 bytes
font_01_sfnt_off0000e821.bin
4f8e0c660b6501b4c5f52742a305275482d6196f30b5c4a74835cdc8df6f7d66
pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 15432 bytes