Malicious PDF — malware analysis report

Static analysis result for SHA-256 8362984f1d892fd2…

MALICIOUS

PDF

43.9 KB Created: 2020-08-15 00:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ba90df190af24fb80457db6880d30ad SHA-1: 9a70c7ce50fc6deb5c18874d2b120a092650166d SHA-256: 8362984f1d892fd2a2684b1e7e54e281a88eb285eb268f5018f2966ed6bc2dd1
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, suggesting a link farm or redirection scheme. One critical heuristic identified a link to a known malicious redirector, 'ttraff.ru', which is further disguised within the document body as a 'kidney function lab report'. This indicates a social engineering attempt to direct users to 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.ru/pify?keyword=kidney+function+lab+report
    • http://xukinare.davidvaldezphotography.com/uploads/1/3/1/1/131164159/degaveje-gafetusis-duxedizitifed-narerunesaxide.pdf
    • http://vozejuf.deadcatcomix.com/uploads/1/3/1/1/131164471/xezag.pdf
    • http://files.luigisalerni.com/uploads/1/3/1/3/131398504/ludasuboza.pdf
    • http://files.metalicsafety.com/uploads/1/3/0/9/130969498/rurefuzupafujuv-kozaviw-tetovelajul-voroxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7366/7225/files/jagamuxoxukadejukeseg.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/namofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/79762370792.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/anime_girl_memes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/libonuwotudodipotaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/xuzefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6079/7333/files/bobcat_331_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/85924315502.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/83896766003.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/55062590675.pdf
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/american_history_textbook_11th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/22852818541.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_off00006ecf.bin
3ed37e27c6c5b5df18dfb10f9b7d76a85f04a4acfa9bdc19c585e5f244e69ee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 5180 bytes
font_01_sfnt_off0000807a.bin
7df8925572b3bb1cfd227ced996791a39d32efc0edc13655c5328a71f11b02b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807A 9964 bytes

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