Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f1d332f3792e23…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 19:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4de3421476ef7eab2309111de7dc9540 SHA-1: 1d542a0a7e72bc3c4d1f1dd8b636f71a0281eb70 SHA-256: d6f1d332f3792e23562876832c333f6b359ea713ec2bf1d7693e37e560f21e75
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with the primary redirector URL being `https://ttraff.ru/pify?keyword=thermal+design+of+air+cooled+heat+exchangers+pdf`. This indicates a likely attempt to manipulate search engine results or redirect users to malicious content. The heuristic firings confirm the presence of a malicious redirector and a link farm, suggesting the document's purpose is to distribute or mask malicious links rather than provide legitimate information.

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=thermal+design+of+air+cooled+heat+exchangers+pdf
    • http://files.mountainbikeashburton.co.nz/uploads/1/3/2/7/132712093/7295386.pdf
    • http://files.makelifehd.org/uploads/1/3/1/0/131070597/wiwezilenu_gezer_vuzexedulax_xafalid.pdf
    • http://files.christianoutreachtools.com/uploads/1/3/2/6/132683000/000c335f5d3.pdf
    • http://files.reflectingonheartfailure.com/uploads/1/3/1/4/131453541/pabipape_kurujekolazisu_fezexunetele.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/gomazumojusapakafapur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/bass_blank_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/16997261049.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/fatuwulajejibufaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6733015585.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/lokujokutesaxilaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/tivimunemuver.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/financial_risk_management_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/adeline_yen_mah_chinese_cinderella.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/36108854908.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/65758640816.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taniseraguvifololesugom.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_off00006bde.bin
1090cfdb3c87e1611458f2b912476993b866c6c8bf76bad05887195685310e18
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDE 5588 bytes
font_01_sfnt_off00007eb7.bin
1f548831252cd82d98e9fb6730d419af3e4ed0d1bbcd0adbf3dcd6c1e67c836b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB7 9868 bytes