Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab63ae8249e17261…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 21:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa64b25649bf63010c4732290f532b9e SHA-1: 9fec82f6605c586fc56cc28f49613df81dfe3b6a SHA-256: ab63ae8249e172614bbdc4822193c02bdcf7ca80b709a93d67206b6b9cfd05ac
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for watching a TV show. The document body also contains this URL and numerous other links hosted on Shopify, likely part of a link farm to improve search engine ranking for the malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=watch+merlin+online+free+season+2
    • https://cdn.shopify.com/s/files/1/0439/1731/2168/files/lafasovasitilifufebig.pdf
    • https://cdn.shopify.com/s/files/1/0433/3142/0319/files/cambridge_primary_science_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/8918/0310/files/3457038901.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/sack_of_discarded_hearthstone_s.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/99732434531.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/kubuwoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4623/1449/files/creative_problem_solving_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4736/files/bopukorupubomogafulora.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/76153702158.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/sutoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/plus_size_black_formal_evening_gowns.pdf
    • https://static.usrfiles.com/ugd/b8c837_25ce794ea87541828f2e8ce8877a5f8f.pdf
    • https://static.usrfiles.com/ugd/57c819_12f92814f6fa4de9982342f027053917.pdf
    • https://static.usrfiles.com/ugd/6df952_1f9192caaa1c4a5397bd0d39c189dfd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb823b2bf3bf42fab79ae2377cbac88d.pdf
    • https://static.usrfiles.com/ugd/7f46b5_13b4e85729ca4277b1b2d778222fa8b1.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_off000056fb.bin
47b164fe296eeac0183e8abd4e883f302c17d86259dd08ce4de2c3e6033ac652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FB 5264 bytes
font_01_sfnt_off000068c3.bin
a7c8410e6d637955636a139e750896b1d0db820c313d9d87fd1627e6ff31a729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C3 10756 bytes

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