Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04c6a88648595f6…

MALICIOUS

PDF

44.6 KB Created: 2020-08-14 21:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d84dfc357ba413b720307d533fabb30 SHA-1: 0ce1034a29dd2ec34e7c6172e0f969c538edc6a6 SHA-256: b04c6a88648595f62e5c635f5a24f92f751593b8038f7f43ff8e7256cabc803b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=guidelines+caesarean+section+maternal+request', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and appears to contain metadata related to 'wkhtmltopdf', suggesting it was programmatically generated.

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=guidelines+caesarean+section+maternal+request
    • http://files.communityplayerstucson.org/uploads/1/3/0/8/130813134/6603057.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/63428997475.pdf
    • https://cdn.shopify.com/s/files/1/0429/2624/3996/files/career_options_after_12th.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/toweta.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/8759565769.pdf
    • https://cdn.shopify.com/s/files/1/0431/5335/9005/files/ginenexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/43169949143.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/47694074603.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/zixanunux.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/gidolezizanetebunebage.pdf
    • https://cdn.shopify.com/s/files/1/0433/6061/6599/files/xajusolipag.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/8821471177.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/
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/zixanunux.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fdb.bin
5e4efa24cd75ec9cca93c5d2ddd806276e5f6ad303cfd0f2ca7f2dae016be827		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDB 5244 bytes
font_01_sfnt_off0000818d.bin
8148969c8cc7f355d4810269965e46a98783424a92d412d9b6524f8847fce8e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 10456 bytes

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