Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bb1e910c6c75cd…

MALICIOUS

PDF

40.9 KB Created: 2020-09-03 04:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ccd5571509ca3b913a01f967f918da9 SHA-1: fcea8b5ea17c429e74ebf7c1a52843cb9d2308ea SHA-256: f6bb1e910c6c75cdcdccb724536a53a0b6d31572021604c84c4a1c2c2ae66228
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, a common tactic for SEO spam or phishing campaigns. One of these links, 'https://ttraff.me/wix?keyword=ciri+ordo+casuariiformes', is identified as a malicious redirector. The presence of numerous links, including this malicious one, suggests an attempt to lure users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ciri+ordo+casuariiformes
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/77725893181.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/falewivigukenafikegara.pdf
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/mowenoj.pdf
    • https://cdn.shopify.com/s/files/1/0448/0840/5152/files/cambridge_english_proficiency_masterclass_2013.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/19072052267.pdf
    • https://static.usrfiles.com/ugd/493135_bbbcc94658214522a4ceeecb4b93acae.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/jiwuxitos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/53408680667.pdf
    • https://cdn.shopify.com/s/files/1/0434/1268/4967/files/diagramming_sentences_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/4519/0821/files/mulezamadugopaguge.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/7992/files/blue_orb_pixelmon.pdf
    • https://static.usrfiles.com/ugd/80bfa9_111da95811d44e4ebd4449d138418e18.pdf
    • https://static.usrfiles.com/ugd/4aae87_a9b25285af4949b59bddf7089470e4f6.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_off00006432.bin
3effeee1641ed74704d0f6b54d2c97287a539c109b72c495911ca6e78b55e858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6432 5040 bytes
font_01_sfnt_off0000753c.bin
95d4060c38689bb201f060663626143f0d66ef5f60bd754bbbfd5572ce8c951e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753C 9956 bytes

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