Malicious PDF — malware analysis report

Static analysis result for SHA-256 927ed5bada75c8e3…

MALICIOUS

PDF

34.7 KB Created: 2020-08-09 02:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba207f00a5ac4503bc85f8971d815b41 SHA-1: f66c1fa7d8ca088d823a861e0f924a757178627e SHA-256: 927ed5bada75c8e308b9f8a46af0d04ea77ee6f440a3adab17905b0999a190cb
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify and appear to be part of an SEO link farm. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=bhagavad+gita+in+bengali+pdf+download'. This suggests the document is designed to lure users into clicking malicious links, likely leading to further compromise.

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=bhagavad+gita+in+bengali+pdf+download
    • http://files.billboudreau.com/uploads/1/3/0/8/130813694/gudabuwugomet_sovajejafamebat_nipoganukezo_sexom.pdf
    • http://files.arifsablee.com/uploads/1/3/1/3/131383760/7dd9b25ae.pdf
    • http://files.discounttowelsofhouston.com/uploads/1/3/1/1/131164281/24a5e.pdf
    • http://files.allamericanoverheaddoors.com/uploads/1/3/0/8/130813692/dcdb3.pdf
    • http://sizador.masonrich.com/uploads/1/3/1/6/131636725/9fad02500.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/ziruna.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/89173498026.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/joxevukusiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/89501532065.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/18773008464.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/28200420509.pdf
    • https://cdn.shopify.com/s/files/1/0450/9057/0405/files/airlift_bioreactor_design.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45560821546.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/zomilokurutodirofedex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/craws_zero_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3693/files/back_workout_bodybuilding.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_off00004a18.bin
06924468a76fc348f99e1424dffdee68f4cd0d3076fbb7a74283d8a4caaa23fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A18 5372 bytes
font_01_sfnt_off00005c7a.bin
0c1be820c9fca15075b75e7e07fec7c9fc111a480290e30a17c0158d02f35400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7A 9752 bytes

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