Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a2bb43422906a7…

MALICIOUS

PDF

38.7 KB Created: 2020-08-30 06:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 049c4030c07e66b8055d2275b0add40e SHA-1: 3d9885b7087b53ed895a239741d674a1614808cc SHA-256: 56a2bb43422906a780536dd9e537dd9175e244760f40e5c53e5eb096b2e15dea
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 2

  • 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.
  • 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.cc/wix?keyword=linfonodo+epitrochlear+nodes
    • https://static.usrfiles.com/ugd/895bef_69624c39b1784fb0a265708f829fc658.pdf
    • https://static.usrfiles.com/ugd/b8c837_612b827bc8e34a2eb1d2979b865c90c6.pdf
    • https://static.usrfiles.com/ugd/162fe6_e0aeb546676945a785e8b44afe439775.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/40070847884.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2635/files/fatelutimadexuvofesotu.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/lamborghini_chalai_song_mp.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/77755921729.pdf
    • https://cdn.shopify.com/s/files/1/0437/6762/7928/files/16254723415.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/lonusalimikusi.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_off00005a69.bin
644d819e978b0b71ec9924f72a85ff0011da1c9022130f723d101ccb966cf025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A69 5184 bytes
font_01_sfnt_off00006c01.bin
4e1db8cd5d815fb0a78e1d150c0df43e92196bb7e616b7415914bb957ba6859c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C01 10160 bytes

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