Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd5ebdf5466abd5…

MALICIOUS

PDF

37.5 KB Created: 2020-09-02 04:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0b08bb4efa432bf986bd128a17b6eb4 SHA-1: ed8429efcd6b647ba5a2996638c7f2c94ae5eb03 SHA-256: fcd5ebdf5466abd591ee48024004e943bef599b1aa9f8ea6a4de3eedae8deab3
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. One of the embedded URLs, 'https://ttraff.link/wix?keyword=sensorless+pm+brushless+dc+motor+drives+pdf', is identified as a known malicious redirector. The document body appears to be heavily obfuscated or corrupted, but the presence of numerous links, including the malicious one, strongly suggests an attempt to lure the user to a harmful external resource.

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.link/wix?keyword=sensorless+pm+brushless+dc+motor+drives+pdf
    • https://static.usrfiles.com/ugd/805d2a_8afbe6c6274c4dadb1cf39181b36c7cf.pdf
    • https://static.usrfiles.com/ugd/5c9621_7839df7a321d4247917a0fb6ec52c39f.pdf
    • https://static.usrfiles.com/ugd/d5415a_c47c4e6a04ae4ecab68c3987ad183fdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_2614918459544740915951193849d94d.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/12632415632.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/mass_effect_andromeda_strategy_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/lozaxixowuwusu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8003/2160/files/unicorn_invitation_template.pdf
    • https://static.usrfiles.com/ugd/3b0c81_c2a7be22de8f46faa2b7694c5516d24c.pdf
    • https://static.usrfiles.com/ugd/a0905b_3f129da302b344249d0e3cda9ad34421.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/gipijojugalekol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0115/1651/files/44807062671.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/berlin_tegel_airport_flight_information.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_off000054dc.bin
2c4aff4c7576028afcdc926349d39e98b1b81a7fbfe1e19e5382c3b8a5c74e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54DC 5488 bytes
font_01_sfnt_off0000675e.bin
d6052e0ea676a53ec324b887a837623b0a046b8b6abcf2c9ea5544c202f67c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675E 9840 bytes

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