Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6351aac6ebfe83f…

MALICIOUS

PDF

39.7 KB Created: 2020-08-20 00:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c35c0f5c5afb6fe48ef3daaac1c8091 SHA-1: c99b67a5fcffd18cf913ab78dce6ff1716f20667 SHA-256: d6351aac6ebfe83fc63a5ef6b4d37cdb343225ef18d5e581f1abe03263ee364b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'Sumerian inventions worksheet answers'. The primary malicious URL identified is https://ttraff.ru/pify?keyword=sumerian+inventions+worksheet+answers, which likely serves as a gateway to further malicious content. The presence of multiple Shopify-hosted PDF links, some confirmed benign and others unknown, suggests an attempt to blend malicious links with seemingly legitimate ones.

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=sumerian+inventions+worksheet+answers
    • http://files.rocoveryfitness.net/uploads/1/3/1/3/131382395/pufejerofe-wuxos-rarurovirono.pdf
    • http://natitazid.keithhphotography.com/uploads/1/3/1/4/131453133/memewuwete.pdf
    • http://files.theduchessdates.com/uploads/1/3/1/8/131856347/a4a50197.pdf
    • https://cdn.shopify.com/s/files/1/0430/9093/5969/files/74366646805.pdf
    • https://cdn.shopify.com/s/files/1/0463/6691/6763/files/backyard_grill_portable_bbq_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/satowajanux.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/83125889566.pdf
    • https://cdn.shopify.com/s/files/1/0440/1024/2198/files/rifejosewuzoni.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/dajemenigefo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/online_converter_to_epub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/fojukukugovojumebibirerow.pdf
    • https://cdn.shopify.com/s/files/1/0441/2358/6712/files/13958627988.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/subakate.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/gatokijebem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/addition_and_subtraction_worksheet_for_grade_2.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_off00005e82.bin
e2f79187788dd978da51d26efb044477b2ac075977d0b4bd344a3be252154360
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E82 5212 bytes
font_01_sfnt_off0000701d.bin
b644fb52e92bb24d916490b076bcd84fda64faa37d09574f413ddfe66f74c5e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x701D 9896 bytes