Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea117fe0a4b0bb2f…

MALICIOUS

PDF

46.3 KB Created: 2020-09-18 20:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 095d75a8038283631c8eadefec598454 SHA-1: f2ba079fbc0d115f886589b4235767a42270ead4 SHA-256: ea117fe0a4b0bb2fd120d82f2f5bd6db65e9693b755129c9577de2259d8b1b84
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to attract search engine traffic. The primary malicious URL identified is https://ttraff.club/wix?keyword=arma+3+manual+trim, which is likely used to redirect users to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=arma+3+manual+trim
    • http://files.vermillioncpl.info/uploads/1/3/0/8/130814283/vajazeb.pdf
    • http://bezapeka.drjamesworling.org/uploads/1/3/1/0/131070450/lidebaribokijadopap.pdf
    • https://ce5400fc-cef3-4422-b78a-d4a69904128b.filesusr.com/ugd/61567a_3c47caefe8da4df2861d26c07e336ceb.pdf?index=true
    • https://d0d9bd11-ec72-4356-830a-ad3e7b6a9a3b.filesusr.com/ugd/a9248e_511d900086b249e5b1d9b67510b3b5c0.pdf?index=true
    • https://e4f56368-1672-487a-88e5-47359d6fe1fb.filesusr.com/ugd/0ebc1f_2e71e7beb5814edb9060928059ba68fe.pdf?index=true
    • https://8bfa85bc-e174-463a-b56b-bb816252165a.filesusr.com/ugd/4aae87_87637a703d134b3184c98d46c4a1fed8.pdf?index=true
    • https://4ff55476-327b-4c85-8214-6526fb24acbd.filesusr.com/ugd/8cbfce_3069c19de639471ca6de1096aa046498.pdf?index=true
    • https://739e0fc1-d9b5-4a44-8619-98cd18c01c85.filesusr.com/ugd/e9cba9_70bae6b7ff2b4cd6a95996a7d5aedc06.pdf?index=true
    • https://57a35d38-ee79-4337-bf67-8e48a00e1a41.filesusr.com/ugd/24deb6_20fb2ba7b8f146d0be0bdd59c9a7fddd.pdf?index=true
    • https://bc222b53-bf1f-4956-a9e4-3f9c86083541.filesusr.com/ugd/8acad3_1f54d4c582a6436aa382d077b554af37.pdf?index=true
    • https://7472192b-d685-4834-a274-2768f366dc88.filesusr.com/ugd/3f80ec_fb37956ca5a54ae4ac6eaa774acedc5f.pdf?index=true
    • https://17365133-57a1-42ec-9dc7-df20ae218813.filesusr.com/ugd/6240f8_616d8879a8454a518a08aeaaccb5bd67.pdf?index=true
    • 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_off000078f4.bin
1836d30677b9ceba4d789381194da973f529ca9295d54efe02b359b359e0719a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F4 4804 bytes
font_01_sfnt_off0000892f.bin
4a0f1c7bd732642a133ea6c4579832c4d12beff8df02432df5a6014f5c37cc8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x892F 10396 bytes

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