Malicious PDF — malware analysis report

Static analysis result for SHA-256 c617cb13c9eac2e2…

MALICIOUS

PDF

58.5 KB Created: 2020-08-29 20:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e1be5735766a0792b4682b325b38aee SHA-1: 6f5d7300f1a74b95c35a051d10e206a93a54a02c SHA-256: c617cb13c9eac2e2fbf67a46df63afa3506a6d2d31a6d9ba03b9c5b55c5bfc8f
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised within the document body, which is intended to lure users to a malicious website. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms this behavior. The document body text, though heavily obfuscated, contains the URL that is also present in the heuristic firing.

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=entertainment+center+plans+built+in
    • https://static.usrfiles.com/ugd/b8c837_1199727eb6db4ef891fdadd5cfa11628.pdf
    • https://static.usrfiles.com/ugd/b8c837_a054bf630dbb487b9970bd36e6cc5104.pdf
    • https://static.usrfiles.com/ugd/b8c837_9692d1755f37498eb62539cc5c5ac7e4.pdf
    • https://static.usrfiles.com/ugd/d54300_d0a65a5e07114f9b85248dfde64e1f89.pdf
    • https://static.usrfiles.com/ugd/ae059d_d64975d5d24644df924214adab71039b.pdf
    • https://static.usrfiles.com/ugd/b8c837_84be9afa38154b139808240a5b1dc8c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_49d9b0c75b4d4f6e9f945c3a117eddd0.pdf
    • https://static.usrfiles.com/ugd/8de238_37e451fdf9b443aabc0eb17fdc61c96c.pdf
    • https://cdn.shopify.com/s/files/1/0439/2416/0667/files/71839261626.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/malaria_treatment_guidelines_zambia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/audi_q5_2018_mmi_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8551/9255/files/vugamofufuwivuro.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/dnd_5e_druid_spells_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/warhammer_40k_tyranid_codex_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/80258065186.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/wugozikipod.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/maryland_form_502_instructions.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_off0000a75e.bin
de827180666fa5cd054a7987ac4d1bc6c68593086a6de2c6c94487f9d0566b2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA75E 5176 bytes
font_01_sfnt_off0000b8d0.bin
e99420e66d4c84290e4235c0b0566bfe44d11b5d8f91f8fd794a2dbbea3b069f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D0 10448 bytes

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