Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db8f89aa30b389e…

MALICIOUS

PDF

65.3 KB Created: 2020-08-30 12:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba1577d8668b511183752581d0c56c27 SHA-1: e6a0dc710175eac046da95e21b958d7272958a2e SHA-256: 2db8f89aa30b389e076e886393fc417d5a1b957f772a52fe6ca59aa1764048e0
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=%25C4%2591%25E1%25BB%2595i+nh%25E1%25BA%25ABn+c%25C6%25B0%25E1%25BB%259Bi+avatar+musik, which is part of a known malicious redirector infrastructure. The document body, though partially garbled, also contains this URL, reinforcing its role in the attack. The presence of numerous external links, many pointing to static.usrfiles.com, suggests a link farm designed to obscure the ultimate destination or to leverage benign-looking domains for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=%25C4%2591%25E1%25BB%2595i+nh%25E1%25BA%25ABn+c%25C6%25B0%25E1%25BB%259Bi+avatar+musik
    • https://static.usrfiles.com/ugd/eed56f_1d610cec59db4c4088dbd741efcfd7df.pdf
    • https://static.usrfiles.com/ugd/4826f5_c3af0eb5b3f34061a5211f6ac2c9318f.pdf
    • https://static.usrfiles.com/ugd/0511f5_62a175d3c84b459c8f25bd3fc42df25e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/twin_bed_sheets_at_target.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/ledepubotuzig.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/hse_carry_over_of_leave_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/7043/1125/files/basinadamazozojebirifezad.pdf
    • https://cdn.shopify.com/s/files/1/0430/4004/7253/files/84058310120.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6b15135841943f7adcf568fb7d4e042.pdf
    • https://static.usrfiles.com/ugd/01bc73_be38adc48b3d45f18c79527bc317fd6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5b4b82739394ef4bb6a35ed2618f455.pdf
    • https://static.usrfiles.com/ugd/b8c837_a25d2ea2402347baa32c25210f26d2f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2ed33a746e141df92f4cf37ceee8fc8.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/tadorinulevum.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/the_ants_go_marching_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/vitisoju.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/jatavagaforarapogun.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072a1.bin
3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A1 6440 bytes
font_01_sfnt_off00008295.bin
f49598c0c4fab7035b6c375bd9928f953526aae12784d30c6f3ef81aefbd71b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8295 6004 bytes
font_02_sfnt_off000095db.bin
3877422c24cc32697861257e31b1b578c873b086686dda709a359cb19d72c98b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95DB 3236 bytes
font_03_sfnt_off0000a2af.bin
569600f05e57f055bc4aca859639630d3ca37fd0b9947be1136684dedbbcad6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2AF 26656 bytes
font_04_sfnt_off0000debd.bin
2c0daff2d2b8c0d557f70e03b3b43f7de82c8fa720f9ed098d6ce8bbc67425ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 16548 bytes

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