Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95975d6f5cbed6d…

MALICIOUS

PDF

45.8 KB Created: 2020-08-08 01:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 418f194cc6c435e454f4df98d0fd934b SHA-1: 66e1ca42df9cb8686395d3983bb7abf170eeaf14 SHA-256: a95975d6f5cbed6d668f13840a3b12ff3692c641527e79b5d2132c5b5aa52f42
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, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.cc/pify?keyword=anorganick%25C3%25A1+chemie+housecroft+pdf', is identified as a malicious redirector. This suggests the document is designed to act as a link farm, potentially for SEO poisoning or to direct users to malicious content through the redirector.

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=anorganick%25C3%25A1+chemie+housecroft+pdf
    • http://files.eerankinart.com/uploads/1/3/1/3/131398097/tivubamexesup_mazimi.pdf
    • http://files.geoffx.com/uploads/1/3/2/3/132302735/c210955b47bde8.pdf
    • http://gafamuz.warwickownerscorp.com/uploads/1/3/1/4/131438641/rovega.pdf
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/cardiopulmonary_resuscitation.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0803/files/tifetodofusiwogiroma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/94909105240.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdf
    • https://cdn.shopify.com/s/files/1/0440/7833/4117/files/potemipelilixakilenen.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/99250521038.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0421/files/the_beginners_keto_diet_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/17606638224.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/ffxiv_encyclopedia_eorzea.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/77358290663.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/15190828829.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_off000072f8.bin
07471f3ffca2e76fa2d0ee633ffd086c147fd9cc9f7f038cd01e5ed8b988169b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F8 5824 bytes
font_01_sfnt_off0000861c.bin
78edee069ea9489f4417f7eec5724dde9497b3882442a98ee4e3fea9fa5d9b96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x861C 10128 bytes

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