Malicious PDF — malware analysis report

Static analysis result for SHA-256 585d91c60137c3d3…

MALICIOUS

PDF

51.9 KB Created: 2020-09-01 11:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 697195e869c44fbec676b477104ed561 SHA-1: cc729d2856ef94997e6ec0b083930b5109c10077 SHA-256: 585d91c60137c3d34c2c3362335234ecc61439bd9ca50eecdf583b696ba27cf3
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains text related to 'games' and the malicious URL, suggesting a lure to trick users into clicking the link for a supposed game download. The presence of a 'download button' heuristic further supports this social engineering tactic.

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/wix?keyword=best+mission+games+for+android+free
    • https://static.usrfiles.com/ugd/b50c55_20b77065417543ce924055994e9937ea.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_251a493db37645aea5f35afe8222872a.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_acfc00267aba4e869ad9da7af26ffa70.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b0faf57070d4187bef536e0dec52e7e.pdf
    • https://static.usrfiles.com/ugd/735424_5764b65cc41d42b08ff7340d9df7b4d1.pdf
    • https://cdn.shopify.com/s/files/1/0461/4180/0601/files/98213685630.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6262/files/88448244412.pdf
    • https://static.usrfiles.com/ugd/9904c2_64fb01b31b45475d9de04c6fe70cf491.pdf
    • https://static.usrfiles.com/ugd/37428b_20caea80afbd405283111f77556737f5.pdf
    • https://static.usrfiles.com/ugd/cb2bed_a8d6519d3ee24050aa7cdd5344c45e55.pdf
    • https://static.usrfiles.com/ugd/b8c837_905a349e35e3427d888c29e42dddf4a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1aa0283f45e24b3c9990fc3d1ef8b32f.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/low_back_pain_arthritis_uk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/20865667669.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_off00008d92.bin
e32a70eda9b65bd4933c353f3640525045f9e51860e0b75a7d62ae07a05185ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D92 5244 bytes
font_01_sfnt_off00009f51.bin
b117a4e716711b5f20a44de71dcf4411c65c4aa84000a66dbaec95e69acc801f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F51 10488 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.