Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef55dc077e50e27…

MALICIOUS

PDF

37.8 KB Created: 2020-08-11 07:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaa4fefd51b12abdb8367cc6049f88a9 SHA-1: c881ec995daa35145f3910af73164058fba69609 SHA-256: cef55dc077e50e27e3e5106240090662af65c945ba2699dff46243c158c1786e
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wb?keyword=redragon%20s101-3%20manual'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains references to the same malicious URL and benign-looking PDF links, suggesting a lure to external content. The ML classifier 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.com/wb?keyword=redragon%20s101-3%20manual
    • http://files.accidentallymj.com/uploads/1/3/1/4/131409574/6d295104b9.pdf
    • http://files.velveteenmommydesign.com/uploads/1/3/1/1/131164009/vubufuti.pdf
    • http://files.stameliareled.com/uploads/1/3/1/4/131406804/dulitumivakoxe-lajuzof-lorepi.pdf
    • http://files.mcmillansj.com/uploads/1/3/2/7/132712355/1580116.pdf
    • http://labifar.montanaarabianhorses.com/uploads/1/3/0/7/130776542/790b04.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/17326442810.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/nujetodawosolot.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/9753437533.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/45178088321.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/mikefafebaviwudefadorope.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/96038381248.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/93302278129.pdf
    • https://cdn.shopify.com/s/files/1/0432/4507/6647/files/bmw_motorrad_accessories_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8115/files/gulemufalapafodiwemu.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_off00005283.bin
024e744dca6a90d3617d2c684a396dcfbfcc95a463f3a7fe3cbedad87dc06cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5283 5540 bytes
font_01_sfnt_off0000654c.bin
95c178ca529c0c9fe9796ec94308b494fdfd1d4136106632c9779044d9864502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654C 11508 bytes

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