Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea7b6f4bdadb80f…

MALICIOUS

PDF

39.7 KB Created: 2020-08-20 02:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac8230699beae52cb315e182981d778f SHA-1: 38de952c920973c8226661a2929542bd98c49f70 SHA-256: 7ea7b6f4bdadb80f43ab4c21afe7907160685cc9cb30c73baec4ec71be576846
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or SEO manipulation scheme, potentially leading to malicious content or phishing pages. 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.cc/pify?keyword=adhyatma+ramayanam+kilippattu+pdf
    • http://files.endtoenduserresearch.com/uploads/1/3/1/3/131380295/9c96b2.pdf
    • http://nexiwaz.thetuesdayprogram.com/uploads/1/3/1/4/131406665/2cc60b82bb8b588.pdf
    • http://files.earthwoodreclaimedfurniture.com/uploads/1/3/1/8/131871462/5921358.pdf
    • https://cdn.shopify.com/s/files/1/0460/3383/0052/files/mulototovisilanubapepafa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5055/5799/files/unblocked_minecraft_mods.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/basusuxoxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/35081493134.pdf
    • https://cdn.shopify.com/s/files/1/0438/0327/9517/files/ghost_adventures_odd_fellows_asylum.pdf
    • https://cdn.shopify.com/s/files/1/0434/0164/2135/files/fats_waller_ain_t_misbehavin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/data_analysis_worksheet_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/57187507890.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/lotitenopef.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_off00005ece.bin
a4d64a8c67ec5a857b7d88306713911e6b83c834f860859b6efe290f2d96e080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECE 5260 bytes
font_01_sfnt_off00007091.bin
04e8b2497eebaf2ec267de9d9406d7b19564183ae0a7c2b25d68c2447282f7b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7091 9828 bytes

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