Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec84fec7651610ae…

MALICIOUS

PDF

54.3 KB Created: 2020-07-29 18:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40291386562f2e71f7a3d5a2941ffd5c SHA-1: c378e7f3b9dd1ee63eb4ce33c630c58e21d2bca0 SHA-256: ec84fec7651610aee2f30b03b82445cf29d4266e4009c3357af2642fb7b0a5e3
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Bed cet question paper pdf'. The presence of numerous external links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.cc/pify?keyword=bed+cet+question+paper+pdf
    • http://files.catherineccartwright.com/uploads/1/3/0/7/130776826/fodenu.pdf
    • http://files.detailersdirect.co.uk/uploads/1/3/2/8/132815785/dinaxotegosokelumabu.pdf
    • http://files.413classifieds.com/uploads/1/3/2/7/132740997/00ecdcc.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/56219591845.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/titoferitijiworogutumu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/31102347760.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/sasododumavanewisimat.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/vexala.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/zonikisad.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/foraninupejajolitidex.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/72148203720.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/24021510748.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/labizemutavabezumomakax.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/18071533286.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076b7.bin
19b07dae0d5eeed6e1b12cd666a5d4323b19c2ee1588a034a9c47e217d0a3449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B7 5172 bytes
font_01_sfnt_off0000884f.bin
7492920ef14d4fe2b8069b43d4d3883be88a75701e962ec73107e283f119354a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884F 10572 bytes
font_02_sfnt_off0000ac6e.bin
3501555d0859a567a833cea4a5536f85c8b74058664cae4a7767c7d97ae96431		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC6E 9844 bytes

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