Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10a4787008247c2…

MALICIOUS

PDF

69.5 KB Created: 2020-08-30 21:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21b27099dd7df0c00a646fdc6e358f65 SHA-1: 0c4af634c36325eb9a37f01d833196208ad7a922 SHA-256: f10a4787008247c23c80ec2aca507300ccfbc056f04c5e1bc524fa6ae47f0fbb
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=mia+khalifa+measurments'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier strongly indicates maliciousness. No scripts were extracted, and the PDF structure itself does not indicate specific exploitation techniques beyond redirection.

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=mia+khalifa+measurments
    • https://static.usrfiles.com/ugd/b8c837_aa573429fb52486d9ceffad07794d9fb.pdf
    • https://static.usrfiles.com/ugd/30e015_2f93d0e54f374d95b6fb798425d7f0d4.pdf
    • https://static.usrfiles.com/ugd/fa6f14_794305c5f5bd4f03bc9f4f71c3b98e54.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9c78eaad5fa42b4ab06b33cb13b0076.pdf
    • https://static.usrfiles.com/ugd/7f46b5_7645efe85a3943d2983e1ef283b68077.pdf
    • https://static.usrfiles.com/ugd/b5472a_8ee85a1cd3d7422e9dde6b1e8214962a.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/niluzovutesuxufapuwet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/39895053847.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/22995967878.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/5044336619.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/56902918890.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_off0000d31d.bin
9a739edee36ce08a7967d0302576503a5f300eaf97ee0b3a3b87b9be74590a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 5076 bytes
font_01_sfnt_off0000e43f.bin
f97163c2b0e08600eb7a9c020fc22d67e12c5e67fc672dda01e3548708590ffa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE43F 10972 bytes

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