Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d37420dd2f74999…

MALICIOUS

PDF

41.8 KB Created: 2020-09-07 20:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9ffd33787c2953b8cf69d081cf5720a SHA-1: 6d4670e71f2be84b346ead0cb57c3995c465f119 SHA-256: 7d37420dd2f74999c8c245adb00119dc5accbfef4b41be8e2ea98f3df3c505d3
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'Bosch router guide canada'. This link, 'https://ttraff.me/wix?keyword=bosch+router+guide+canada', is flagged as malicious and leads to further redirector infrastructure. The document also contains a large number of embedded links, many pointing to static.usrfiles.com, which is identified as a link farm. The ML classifier strongly indicates maliciousness.

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.me/wix?keyword=bosch+router+guide+canada
    • https://static.usrfiles.com/ugd/912de2_e66fe03bb48742449750f7423d063efb.pdf
    • https://static.usrfiles.com/ugd/ea78e0_492c0cf8c7b845b4ba8b8217c098f3da.pdf
    • https://static.usrfiles.com/ugd/49488e_b8529d3019194dedb90475994aea8413.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/kipowawoserixu.pdf
    • https://static.usrfiles.com/ugd/739437_7c1bb9693e5943cdb44d92850c9f2113.pdf
    • https://static.usrfiles.com/ugd/b1277d_517861a7b8e74e9b9cc4b4c32086e92f.pdf
    • https://static.usrfiles.com/ugd/a891c0_1627dff0c0bd4ce5a73a90bbcb6e7b2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f31e5b92342443bbf0fd6b95516c983.pdf
    • https://static.usrfiles.com/ugd/63022f_e40f5345d4fe4e49a2f23202b680fd76.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005823.bin
bc7f334eb0d3eed2e37c9fe2005551d4cec4ef8edd3bbe77acf6a5820127b0ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5823 5100 bytes
font_01_sfnt_off0000696d.bin
649cc3ef69713f8bb1e791ecdde54c77892ddb827250dd6e823b1c1b8c1cad06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696D 10316 bytes
font_02_sfnt_off00008cbc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBC 4324 bytes

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