Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bae69e79bc8fcb2…

MALICIOUS

PDF

39.2 KB Created: 2020-08-19 23:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b38f412fe4b9d44e0ca022a77b053c9 SHA-1: a5c6834a9dd0ea6392991344f7641b1f7581a1a3 SHA-256: 4bae69e79bc8fcb2d84d1533b01366dcb99c1e5f8c00c38753755ca1b83ec071
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=codycross+game+answers'. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on shopify.com. The document body, though heavily obfuscated, contains references to 'Codycross game answers' and the URL 'https://ttraff.ru/pify?keyword=codycross+game+answers', suggesting a lure to a potentially malicious site disguised as a resource for game answers. No scripts were extracted from this sample.

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=codycross+game+answers
    • http://zujetejox.pennyspetproject.com/uploads/1/3/1/6/131637309/c27d0deec9092.pdf
    • http://xetura.martinhartfilms.com/uploads/1/3/1/4/131483025/liguvotar.pdf
    • http://files.cavysa.org/uploads/1/3/0/7/130775197/1732728.pdf
    • http://files.tvgoldsmiths.com/uploads/1/3/1/3/131384113/wosipuzol.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/arcanum_unbounded.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/manual_chiller_carrier_30hxc.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/99158271708.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/75648790896.pdf
    • https://cdn.shopify.com/s/files/1/0429/6012/6118/files/jijasozagiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/rofapoginaxijezokikeki.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/mifoxunizix.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_off00005c80.bin
2767e1b8dc1fd275c02bfdf10069880b2544b8155bd41ee57e94c26f81082891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C80 5328 bytes
font_01_sfnt_off00006e94.bin
a0b68c07812aaafa84bd343dfadc326a717cfc47dbbf5eb74ac9f1620314f37f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E94 9908 bytes

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