Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94b8828cd65812b…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 05:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0544da6e78b9f2b7d28f145f61fddc35 SHA-1: ec2cce70dd34a6d2c146652ad8db988503858f6c SHA-256: d94b8828cd65812b8ec583d863a95f7f806e650fc06c2308d9ca41fc393fb092
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'battery charger circuit pdf'. No scripts were extracted, but the primary attack vector is the redirection to a malicious site.

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.com/wix?keyword=battery+charger+circuit+pdf
    • https://static.usrfiles.com/ugd/2f8cea_e83bc9664cb94989bf4ddd315949ddba.pdf
    • https://static.usrfiles.com/ugd/b28561_059228a6806f47fb9c325e55d7486a3a.pdf
    • https://static.usrfiles.com/ugd/83f04e_c6265df45c864e66bbc3bb7ea284a87c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7999ec000b414b9ab60f8d2f27abc963.pdf
    • https://static.usrfiles.com/ugd/eda9ba_c5f215a6773e442eb52eaf5e0ea58646.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/kivikufiwumojaxopikepejar.pdf
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/mamitari.pdf
    • https://static.usrfiles.com/ugd/0c4177_837860e554be4dd9b3f3cbcb8fb9d7de.pdf
    • https://static.usrfiles.com/ugd/909b15_f65f9c6673624b0cb4d2ffcd319dbc60.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83e55ae049b44ef9bea7ddb6f6da725.pdf
    • https://static.usrfiles.com/ugd/5ed537_9fc00d3b9a504a7a928ced6f3c1f4f43.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2622/files/applebee_s_menu.pdf
    • https://cdn.shopify.com/s/files/1/0461/7591/2090/files/galatevaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.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_off00005dd0.bin
6c4d9edbb1e3b7b44d58ca871d32684436c8723895dd7be6226bb417e2f6a058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD0 5356 bytes
font_01_sfnt_off0000700d.bin
07aa21bbc469edda203564bdda6105c659daf2cd521eb59bb0185ef37fd2a40e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700D 10120 bytes

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