Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85e7314fbfe0a50…

MALICIOUS

PDF

42.1 KB Created: 2020-08-30 11:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffedf851306807a29e5a734875ba959e SHA-1: d88e6398b9eb0983c8d0227d9c026d2392fa17e7 SHA-256: f85e7314fbfe0a50daa0b746af4edf5592b7d21ac1a2ac935c0085e946fa9092
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=singer+sewing+machine+manual+free+download'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to potentially malicious content under the guise of a free manual download. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs.

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.com/wix?keyword=singer+sewing+machine+manual+free+download
    • https://cdn.shopify.com/s/files/1/0435/9222/0829/files/nintendo_3ds_pokemon_games_rom.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/escape_room_game_answer_level_81.pdf
    • https://cdn.shopify.com/s/files/1/0431/5833/9733/files/charlie_puth_betty_boop.pdf
    • https://static.usrfiles.com/ugd/c068f8_610b00e9334d4b0c96f463b3f216e1e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fa1466d1aa44bd5b620557878d09a9e.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/53777666435.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/wijukajiwapuromufini.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1056/files/73197423179.pdf
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/47382061436.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/unchained_melody_righteous_brothers_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/67983293224.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/gagomot.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_off00006530.bin
954371c0c20894967ca66fb9ea82dafe3481ff502e8eacfdae8bb11f2c608282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 5628 bytes
font_01_sfnt_off00007838.bin
9842b2ad3fddf0776e45ef6531ee2689750037019a88700c5d02df603e1e1e36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7838 10484 bytes

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