Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18dce505b3c6ff4…

MALICIOUS

PDF

55.3 KB Created: 2020-09-21 09:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10a59d3b2c50d68e13306c995ef7e2da SHA-1: b96eedcaf576d3fb66266c280cded78f37def330 SHA-256: e18dce505b3c6ff4e7e5134f8924c45ae749ec716eb019f38cf925d1e7130d10
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector known to host malicious content. The document body, though partially corrupted, suggests a lure related to 'Call of the wild multiple choice test answers'. The primary malicious URL identified is ttraff.me, which is flagged as a malicious redirector. The ML classifier strongly indicates 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.me/wix?keyword=call+of+the+wild+multiple+choice+test+answers
    • http://nanexibik.highimpactanalysis.com/uploads/1/3/0/7/130775705/5b58d6.pdf
    • http://tizopura.eyeholejig.com/uploads/1/3/0/8/130873995/rozemupuke.pdf
    • https://ffb69c52-88d0-45fe-9175-e161d55e024b.f
    • https://ba15c5dd-0bad-408a-9055-c06fbaa686d6.filesusr.com/ugd/ac1638_30a0fef18d2e4fb6a07aa8e82e6f31ac.pdf?index=true
    • https://3a1fbdfc-298e-45b0-bf3d-6fe5cfbb98cb.filesusr.com/ugd/5bb01c_19e8be63c39140f3ab3a01c7cc17e709.pdf?index=true
    • https://09961a00-ef62-40c5-a48d-56352167a848.filesusr.com/ugd/a43ec6_87ea6c100d7948c1bcb013c8db76be2b.pdf?index=true
    • https://e2200fa9-8965-4058-a2c5-bed02eae84de.filesusr.com/ugd/217d68_18a76b6f1b4345798ba6c4e52f911736.pdf?index=true
    • https://fc1c3248-a677-4bfe-8658-3f6ff96f09e6.filesusr.com/ugd/bc79a4_30603a2452b149d8ae3f7a2ae2a06607.pdf?index=true
    • https://41eb2619-2146-449b-978b-6fa43eb73981.filesusr.com/ugd/7d2910_e0333720df024a879dbabacf9db9dc1e.pdf?index=true
    • https://b22f26dd-11f7-4883-a04e-cbe99db46baf.filesusr.com/ugd/9117e0_c3bfd301dbf8445e92f4f0337d7fa855.pdf?index=true
    • https://ac9baddd-74bb-458d-a190-768ccceec7eb.filesusr.com/ugd/a771bd_36c882688ca5462fa6ca9ea2e4a96b81.pdf?index=true
    • https://4193bb26-b29f-42f0-86ba-75321bf22b04.filesusr.com/ugd/6f5f23_090ef0be85d64fc6b6c8be506613cd44.pdf?index=true
    • https://e7dff7c4-18d2-4f03-9b0b-b2022b235fd2.filesusr.com/ugd/1b6cec_9a3c0d9f02c34cc68ac32c3f750cb1ab.pdf?index=true
    • https://b9de678d-d316-4bf2-86bc-1b91eabd8b9f.filesusr.com/ugd/4329d7_357cda763e6742259a63d85cbc1cbc1c.pdf?index=true
    • https://ffb69c52-88d0-45fe-9175-e161d55e024b.filesusr.com/ugd/71fd01_883dae8e9288499ea3ab634625aecb96.pdf?index=true
    • https://c5e87613-8565-4ac1-bbd0-b06fb7c7641d.filesusr.com/ugd/ae059d_fb34078789104915a292e19eb7e4f7de.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b79.bin
f007f99cfadfb40323bfd3bb60d5ac06f40ec05b6d56329b7219e509c792985a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B79 5392 bytes
font_01_sfnt_off00009dbf.bin
a2ef08c73ee30eb4e407d7abf32d7f6656daa9322000e094d4971f65f12378f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DBF 10568 bytes
font_02_sfnt_off0000c1cf.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CF 4324 bytes

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