Malicious PDF — malware analysis report

Static analysis result for SHA-256 914510886bbf4dd6…

MALICIOUS

PDF

42.6 KB Created: 2020-09-01 06:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab559a0f178f893dedb60a8e2fb37ef4 SHA-1: 46efbdf9428f30d8917ad192fed6477ba0701f20 SHA-256: 914510886bbf4dd6de3b3c52be28500023cdcc2a8e4e9b2cc8cfb45c20f513ea
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the text 'Biztalk server 2016 enterprise edition' and a URL that matches the malicious redirector. This suggests the document is a lure to direct users to malicious content.

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.link/pify?keyword=biztalk+server+2016+enterprise+edition
    • https://cdn.shopify.com/s/files/1/0447/9343/0177/files/nationwide_isa_transfer_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/99061044539.pdf
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/garasulobaboxow.pdf
    • https://cdn.shopify.com/s/files/1/0434/8873/9494/files/paraquat_poisoning_guideline.pdf
    • https://static.usrfiles.com/ugd/67f5f7_66fc3a92e3034387a4af8225262faced.pdf
    • https://static.usrfiles.com/ugd/67f5f7_8233f5d5d2754063b1a115c50aa1100b.pdf
    • https://static.usrfiles.com/ugd/e2c250_63bae1c5e726457e82af166c80fa2e9c.pdf
    • https://static.usrfiles.com/ugd/9e41f0_4eb66608fcc442038d865dc6f1053c10.pdf
    • https://static.usrfiles.com/ugd/625844_e98d934d4a484d659b6dcc104bd0f43c.pdf
    • https://static.usrfiles.com/ugd/b8c837_79eba934a7234347be9d08136de9d753.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5a5047d9d8a4ecbba75e7760441ed38.pdf
    • https://static.usrfiles.com/ugd/c345b0_a592ef5e76ec48a180423c3a5905bcdf.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_off00005a0c.bin
9c03d19965de3e52a5de3b9927322658730bf890d8bff0c0dbd30bdd7706429d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 5444 bytes
font_01_sfnt_off00006c9c.bin
9dae2c6aea36f89c600f3d57fc117f82f7ce3fb399bd943bc4883f840cb3de9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9C 10200 bytes
font_02_sfnt_off00008f90.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F90 4324 bytes

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