Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b4e07a4a4f1ca7…

MALICIOUS

PDF

49.1 KB Created: 2020-08-04 01:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 554389e0313a8a943b0d21bfa0f659f1 SHA-1: 68f8b32ee965472a539b049d8f629301e1818a24 SHA-256: b7b4e07a4a4f1ca706d7516065b7d23e98fe7605c1bc4d501d6b4c5837a327dc
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=difference%20of%20perfect%20squares%20factoring%20worksheet'. This indicates the document's primary purpose is to trick users into visiting a potentially harmful external site. The PDF also exhibits characteristics of a link farm, with numerous embedded links, further supporting the malicious redirection intent.

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/wb?keyword=difference%20of%20perfect%20squares%20factoring%20worksheet
    • http://files.lucascountyshac.org/uploads/1/3/0/9/130969573/varivuvatetop_batoxopajade.pdf
    • http://files.jaml.org/uploads/1/3/1/6/131607163/737587.pdf
    • http://files.academycounselling.com/uploads/1/3/1/3/131384735/a9e23.pdf
    • http://files.dptrackandfield.org/uploads/1/3/0/9/130969358/benurulewudigoganibu.pdf
    • http://files.tinydapperfox.com/uploads/1/3/1/1/131164174/pefev_juriravoninubag_fezolemux.pdf
    • http://files.dptrackandfield.org/uploads/1/3/0/9/13
    • https://cdn.shopify.com/s/files/1/0432/0450/9853/files/80715128979.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/vuromekaxafiraluti.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/vuwurobopopomo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8444/5864/files/dogavodut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/46535751152.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/rise_of_afrikaner_nationalism_essay.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/15616956337.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/16991444496.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/zutusasuzuza.pdf
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/safety_precautions_in_welding_workshop.pdf
    • https://cdn.shopify.com/s/files/1/0430/5023/8101/files/80647962659.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/desuzezapake.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000716c.bin
2c3445f85fe67d7a6cc06cf4558e94c9286192026f2de31d8d89f689487bbe0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x716C 5408 bytes
font_01_sfnt_off000083e2.bin
b1ff5fdf2ec5bc2e9aa64f5a565373067811583eeb8880d1cec3ed65fcb64afa
pdf-font-stream PDF embedded font (sfnt) at offset 0x83E2 10744 bytes
font_02_sfnt_off0000a898.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA898 4324 bytes