Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ef9aa6135db18c…

MALICIOUS

PDF

51.0 KB Created: 2020-08-14 10:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ed5a863247e051b868c1e2ee56b3cf SHA-1: 82c2262b3bea01b6793ec418f0c3a7d642bbe638 SHA-256: c3ef9aa6135db18cd2c40c29a883865ab344335750b423e06c214388658f0fb4
150 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, specifically pointing to 'https://ttraff.ru/pify?keyword=yaadon+ki+baaraat+songs+free'. This URL is embedded within the document body, suggesting a social engineering lure related to song downloads. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=yaadon+ki+baaraat+songs+free
    • http://files.thebiologistapprentice.com/uploads/1/3/2/6/132695472/domedisurowedilutuv.pdf
    • http://vexajam.mccoypta.org/uploads/1/3/1/1/131163927/4107109.pdf
    • http://pawuwe.madelize.com/uploads/1/3/1/1/131164250/pevow.pdf
    • http://molud.thecatholiccrusade.com/uploads/1/3/2/7/132740585/xudarusumewe.pdf
    • http://files.herefordshirefencingclub.co.uk/uploads/1/3/2/7/132741194/sakogolegomikibem.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/lisep.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5355/files/90895799715.pdf
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/aerobatic_maneuvers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/31170314642.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/29290971147.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5519/files/99833987894.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/vufujazegisebut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gikari.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/pepasodilopibidikukunibi.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/58676998002.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/98992879049.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_off0000803c.bin
833d0162ecad8017c751b61e9ca6a1b77835dba0ab6d7fe524ca6edd331bc795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x803C 5208 bytes
font_01_sfnt_off000091fc.bin
5d853e7ebca7caf505a74d2715c00209b3190af748c2b16fd2577065359eeab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FC 14636 bytes

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