Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd6cec82cc4eb8d…

MALICIOUS

PDF

55.0 KB Created: 2020-09-02 21:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 052c592c6436ec375fdeee80d6805988 SHA-1: 52e133dde73e76230206e3a1345d72a0b7e59589 SHA-256: 2bd6cec82cc4eb8dc29b529019960a8ff563a86c07ec50f199f2457ca9fc23d8
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 'https://ttraff.me/wix?keyword=bioremediation+introduction+pdf'. This link is likely intended to lead the user to a malicious site. The PDF also contains a large number of external links, suggesting a link farm or SEO abuse tactic. 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=bioremediation+introduction+pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/microprocessor_and_assembly_language_programming.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/audit_bureau_of_circulation_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/mapikixij.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/zesirolirinujedomogagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7320/7446/files/carlos_castaneda_espaol.pdf
    • https://static.usrfiles.com/ugd/9e41f0_32d1d4f85c1b4ec09c80ce7ebad46bb9.pdf
    • https://static.usrfiles.com/ugd/87d215_360ecf42aa3d404e97448f575bca8221.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_fef6abb01bb6449f9452a19d6dae0a93.pdf
    • https://static.usrfiles.com/ugd/01e791_36c13be398464bb181fc87fafd39aa48.pdf
    • https://static.usrfiles.com/ugd/451461_7533a7be4da944739b50d17862d1cc68.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/head_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/green_finch_and_linnet_bird_sweeney.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_off00009a2b.bin
793206843fa4f27d95d95b6ace7ade7848faadd758621d169785f90a98f33303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2B 5140 bytes
font_01_sfnt_off0000ab90.bin
437d59479b9153adaefff87b7f25629b2253f4a240bde8e535902b0fe1f4a644		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB90 10476 bytes

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