Malicious PDF — malware analysis report

Static analysis result for SHA-256 5911dd271d076f3e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 07:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fb3a389356ef73016137ca3c4d45c83 SHA-1: e15da2d60899122fdb5fbb755bb9536c31e136e7 SHA-256: 5911dd271d076f3e35095b8dd1b4eef80cac78e9228f4dbc16e613c64868a86b
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=android+application+emulator+for+pc'. This URL is part of a link farm designed to drive traffic. The document body also contains this URL and mentions an 'Android application emulator for pc', which serves as a lure. The presence of numerous external PDF links, many hosted on benign platforms like Shopify but likely serving as decoys, further supports the social engineering aspect. The primary intent appears to be directing users to malicious infrastructure via the ttraff.cc redirector.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/pify?keyword=android+application+emulator+for+pc
    • http://vened.shout4joy.net/uploads/1/3/1/8/131856333/6906124.pdf
    • http://renenoj.sunshinedentaldds.com/uploads/1/3/1/1/131164243/rinajobebow.pdf
    • http://files.georgisztojanov.com/uploads/1/3/0/7/130775970/gifujizazajapotajufu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4985/1811/files/vigusanijusebonojerirodet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5733/2895/files/wordly_wise_3000_book_8_fourth_edition_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/jezawoxotop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/c_est_vs_il_est_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/the_avery_shaw_experiment_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/bhartiya_sanskriti_ki_visheshta.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/camping_checklist_uk.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_off0000699a.bin
71307ce9bbc0b024b62b851427c84b7bae6cfb95794ea5c17932ed0c4210cf5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699A 5112 bytes
font_01_sfnt_off00007ae3.bin
5382d7faa8ec2b2a93194dbefebbb65f43d493dc2146824150ee46c6869478cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE3 10196 bytes

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