Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a40d1a1f7401933…

MALICIOUS

PDF

37.9 KB Created: 2020-09-18 09:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07ec4d953f60e0ad1d85d5ec608ede0a SHA-1: a37a0b18852699cc238bc0377225533245f282bd SHA-256: 8a40d1a1f7401933184a56fe956030a856a5969e415ee922a3fd16508321854c
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to a redirector service, disguised with a keyword related to a game. This link, 'https://ttraff.link/wix?keyword=strike+force+heroes+3+unblocked+full+screen', is flagged as malicious. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content. 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.link/wix?keyword=strike+force+heroes+3+unblocked+full+screen
    • https://cdn.shopify.com/s/files/1/0436/4635/3561/files/xotowulutamurubob.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/mibupemavogebivo.pdf
    • https://cdn.shopify.com/s/files/1/0448/2190/5570/files/baofeng_dm_5r_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/75285339930.pdf
    • https://47c2cab1-c767-4e56-b0c1-52386674475e.filesusr.com/ugd/d4da64_31742d6c683943e2988738bc7dfff107.pdf?index=true
    • https://c24b5acb-430a-468f-9897-f5377f275621.filesusr.com/ugd/1c8c1e_a983f098b04f4f6884672651e771256e.pdf?index=true
    • https://90f5a532-807f-4915-a903-e4611e31445b.filesusr.com/ugd/76156b_9257fbf800c74877bfeb18e6b3557528.pdf?index=true
    • https://2e036cc1-0005-4bc3-8180-0dd63459aa0f.filesusr.com/ugd/c75f60_3d763b71645d44539fc6ee87c8b6a796.pdf?index=true
    • https://8b49de70-13cc-441d-ad6a-d8197dca1703.filesusr.com/ugd/7dd30d_2f148755076a4314828aa09062e47676.pdf?index=true
    • https://72b2297b-3dd3-45d3-bd52-b6cf672ff801.filesusr.com/ugd/8508de_8b6e790ed1974666b668d3418e5c0f95.pdf?index=true
    • https://907b4fd3-54d3-44ab-9a7e-cbd716597aaa.filesusr.com/ugd/19ce5d_c4bd404724844541b7518b3a65474649.pdf?index=true
    • https://fd61be35-f36a-4aa3-b66f-3aeb94af0478.filesusr.com/ugd/622218_530943acf5574dd88aa2a2a571b61c35.pdf?index=true
    • https://f9c1628f-c4bc-43c1-9b37-55292bfd5676.filesusr.com/ugd/e98895_c3a74d1bf87c40628a3d6703330ff05c.pdf?index=true
    • https://24f8061f-377d-4a8a-b457-2156fcc8fd78.filesusr.com/ugd/008a9f_4deb018d0de5409fa667b719781f973a.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_off00005430.bin
b3ab1e777b3a4577e8d04a1189147af3985ef27bf6b0500c15ecb146434bd438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5430 5372 bytes
font_01_sfnt_off00006673.bin
294254a34de83cf451549a63866e94f99af2ce3543691eddf7d22d778fbd0952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6673 10660 bytes

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