Malicious PDF — malware analysis report

Static analysis result for SHA-256 43767e72cf735156…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 10:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b81e8c2b744d19e61318645f74b7dfa SHA-1: 91d341c06781f94b43656e8d6d03b5961354aa9c SHA-256: 43767e72cf7351567364301ab0a7cef112b1d43be1f8d426bb11a494f519ef09
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=wallpaper+for+laptop+full+hd', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the document's purpose is to drive traffic to this malicious redirector, likely as part of a SEO poisoning or phishing campaign.

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=wallpaper+for+laptop+full+hd
    • http://mitexofap.hiddenone-sprites.com/uploads/1/3/1/3/131384611/tapurosazojem.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/zombie_catchers_hack_mod_app.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/sixikofetaxanojemunamise.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/susafirot.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/44277559687.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/anglo_boer_war.pdf
    • https://cdn.shopify.com/s/files/1/0430/8097/4490/files/88601787697.pdf
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/building_bye_laws.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/bulawayo_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/exercices_d_atomistique_et_liaison_chimique.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/gta_5_xbox_one_dns_codes.pdf
    • https://cdn.shopify.com/s/files/1/0447/6990/2743/files/carruthers_organic_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/69585538543.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_off00006085.bin
68ba26308041f0b204c09c7562905617becb651328c54b09589186bba2329c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6085 4964 bytes
font_01_sfnt_off00007170.bin
b60e1bf2e5e2e0e7311f913fed680ca7641fdb4bdfb3b8a7558bc6d53e05584f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7170 10588 bytes

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