Malicious PDF — malware analysis report

Static analysis result for SHA-256 a818e7424e230ac5…

MALICIOUS

PDF

42.3 KB Created: 2020-08-13 04:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1913f31060c0acb7142dc334df1710f4 SHA-1: 70cf705fdf4f2d783d36a338c43b059105928ea6 SHA-256: a818e7424e230ac5a8945f5927c65093bfa2d7357a7c6679c53a51efb7b2af21
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, a tactic often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/wb?keyword=best%20ocr%20software%20pdf'. The document body also contains this URL and other links, some of which point to potentially unknown domains. The presence of a 'download button' lure further supports the malicious intent.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=best%20ocr%20software%20pdf
    • http://zoziwi.ignite-the-change.com/uploads/1/3/1/3/131384281/lizad.pdf
    • http://files.interfaithweddingrabbi.net/uploads/1/3/1/3/131379615/dozaziwozit.pdf
    • http://nodizol.nalomelihoney.com/uploads/1/3/0/7/130738870/814929.pdf
    • http://tisuw.stripperguy.com/uploads/1/3/1/0/131070847/towab_jokuwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2062/2756/files/agendas_2020_en_para_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0432/7827/0619/files/92500588024.pdf
    • https://cdn.shopify.com/s/files/1/0439/1357/6603/files/bumerasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9446/6969/files/pogo_game_app.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/fufutegazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/zuwobun.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/nonobudafejekomagenuzuvul.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/77883710725.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/butterfly_valve_tozen.pdf
    • https://cdn.shopify.com/s/files/1/0437/7480/4126/files/candidate_testing_service_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/vazizubutivexamet.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/jeep_wrangler_parts_catalog.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_off00006539.bin
d777b8c96b3fa82f5076bb5e40b2c766c333370753a894790bc30d682d247801
pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 5260 bytes
font_01_sfnt_off0000773a.bin
9cad67486a5ce0ec96c1a56eb85b7dcfaf2cfcec00b7cd5f719e453c3698d06a
pdf-font-stream PDF embedded font (sfnt) at offset 0x773A 11276 bytes