Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8dc1408f636e1ab…

MALICIOUS

PDF

62.3 KB Created: 2020-07-31 13:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0eae97702c18dc431986478baaf9d21 SHA-1: 8e038d94cc17c3b6f032e3dcc70eab55b7996ed7 SHA-256: e8dc1408f636e1ab29a8c58ef53a85255af3996da641eb910bd6c76f2f578d40
150 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, masquerading as a CCNA lab manual. The primary malicious link, 'https://ttraff.ru/pify?keyword=ccna+200+125+lab+manual+pdf', is identified as a malicious redirector. The document also hosts a link farm on Shopify, pointing to various PDF files, likely to improve search engine ranking and distribute the malicious content further. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=ccna+200+125+lab+manual+pdf
    • http://files.theglutenglitch.com/uploads/1/3/2/6/132683137/jiwefadodi_tagumebudimuvu.pdf
    • http://files.heritagehighway120.com.au/uploads/1/3/0/9/130968967/dameriwukalonip.pdf
    • http://files.shopflawlesshepcat.com/uploads/1/3/0/7/130776142/mazamaxuwi-jutomajuwi.pdf
    • http://files.happy-cow-bakery.com/uploads/1/3/2/6/132682904/gefunagubofoz.pdf
    • http://files.galsinstitute.com/uploads/1/3/1/1/131163635/84eed110ca196de.pdf
    • http://files.shopflawlesshepcat.com/uploads/1/3/0/7/130776142/ma
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/85764735883.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0597/files/34375821784.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/rupurevin.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/wokurobabigaraxuxikep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofoxi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/pebilevijimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/46149162555.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/39190109233.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/63410539263.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/wewuveduline.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_off0000af4c.bin
9c94ab8741247434381527c2746bee54ce1a1bd42c4b1f550181bed42c117ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4C 5164 bytes
font_01_sfnt_off0000c0bd.bin
2608ac3634b2d78b92fbc83d044d18ad8bcf977554ad2837560449a66179a11d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BD 13580 bytes

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