Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47c51486ba097bf…

MALICIOUS

PDF

41.6 KB Created: 2020-09-15 21:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51ccff9a2ea2b0664b3e5c08e519b76f SHA-1: 5c0edaacc53d7e74aff366d21ebae9fae7dfe522 SHA-256: c47c51486ba097bf7e8320108fbf954f4181a66bb3af71ab3ffbd94a01867a2e
160 Risk Score

Malware Insights

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

The PDF document contains a prominent link that directs users to a malicious redirector, disguised as a download for 'adblock plus apk'. This lure is intended to trick users into installing potentially harmful software or browser extensions. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely to improve search engine ranking and distribute the malicious lure.

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.me/pify?keyword=download+adblock+plus+apk
    • https://static.usrfiles.com/ugd/a2c2bc_8910eb429378418da9f47a1445bbbefd.pdf
    • https://static.usrfiles.com/ugd/defcb2_8e92465d5d0643f5b543949d03ae9d4e.pdf
    • https://static.usrfiles.com/ugd/136d07_9e501e50e89e4837974f6337d67b71e7.pdf
    • https://cdn.shopify.com/s/files/1/0459/9562/2559/files/32601980893.pdf
    • https://cdn.shopify.com/s/files/1/0430/0301/9427/files/greedy_algorithm_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0466/5635/6517/files/fazokad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/create_letter_template_in_word_2016.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/66114205923.pdf
    • https://cdn.shopify.com/s/files/1/0460/0594/4487/files/tezafabige.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/dream_theater_octavarium_album.pdf
    • https://cdn.shopify.com/s/files/1/0457/7338/9980/files/ben_10_omnitrix_aliens_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0459/5800/4895/files/zifinoxeravuta.pdf
    • https://cdn.shopify.com/s/files/1/0469/0742/4928/files/tamatirosanudutukor.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/1844303901.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1373/files/65895820962.pdf
    • https://cdn.shopify.com/s/files/1/0435/3720/3364/files/jisimorifufapafujamexe.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_off00006132.bin
cf01a59afce648d3bcd4541b35f95e21f67e881ac57c720a1698b78de42f295e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6132 5264 bytes
font_01_sfnt_off00007343.bin
39640d67386f849a3a91bb9408d358d2e94379c516856f49c02ce944cf4d696e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 11944 bytes