Malicious PDF — malware analysis report

Static analysis result for SHA-256 95467024ddbc1c17…

MALICIOUS

PDF

59.1 KB Created: 2020-09-12 02:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e17aea7728929b7c0bfda2a4be9ff107 SHA-1: fdeb06c8f11b5ba402bd35230c6322167886ff8d SHA-256: 95467024ddbc1c176c2ebbd9ebb658b799268f5a5206f4070fbbc9d97fd367e8
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one that points to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to game search engines or distribute malicious content broadly. The primary malicious link is https://ttraff.link/wix?keyword=chest+guidelines+antiphospholipid+antibody+syndrome, which likely leads to a further stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=chest+guidelines+antiphospholipid+antibody+syndrome
    • http://files.sgsmi.org/uploads/1/3/1/4/131452982/d72ea5.pdf
    • http://files.jennysburke.com/uploads/1/3/1/0/131070336/vosative.pdf
    • http://files.dealerleveldiagnostictools.com/uploads/1/3/1/6/131607467/rivenorin-xufolu-zixoxexirofilip-fudufovaxeregeg.pdf
    • http://vopuz.gogreenparkridge.org/uploads/1/3/0/8/130874493/6321648.pdf
    • http://files.upperarlingtonmusicacademy.com/uploads/1/3/1/0/131069819/7bf4289.pdf
    • https://static.usrfiles.com/ugd/7d2910_208d14d7aadc461c8a42e5f6711fe2d0.pdf
    • https://static.usrfiles.com/ugd/46429b_4c305d0eff3843aca65ae80a81ea188a.pdf
    • https://static.usrfiles.com/ugd/bf0735_c30b991678784c5481527832d48d9d21.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/fedex_freight_bill_of_lading_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/behavior_management_strategies_for_preschool_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/msvcp140._dll_windows_10_32_bit.pdf
    • https://static.usrfiles.com/ugd/c8a981_4ff914edcdd04a1d8f5040146ad600dc.pdf
    • https://static.usrfiles.com/ugd/83b1b3_d1afa80e2eb149218373e101c2bc10a1.pdf
    • https://static.usrfiles.com/ugd/b85eb0_ea0228d4dcb54478be50328a647d33c6.pdf
    • https://static.usrfiles.com/ugd/a98ecc_f372060a82bb49cc92e53b1a8842cee4.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_off0000a8bd.bin
f9dfc3f61f40bd43a3d8250511193b7927edfb5f6d1ffd4287c605b6852c0f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8BD 5520 bytes
font_01_sfnt_off0000bb53.bin
13b43ab53dbceb86067fff1679b481fdf7549521627f0a511c835856401cc172		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB53 10400 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.