Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5465e76aefcdeb5…

MALICIOUS

PDF

46.2 KB Created: 2020-08-29 01:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 266e682532d768665c2007a232492035 SHA-1: 60f104c4d6fdca3618539ff2d7b3bd1820de05dd SHA-256: f5465e76aefcdeb53c2e2ea1cb40c9b270f4d2d8264c7507cdba73865d4ebdbb
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are identified as malicious redirectors. The document body, though heavily obfuscated, contains text related to a vehicle owner's manual and the wkhtmltopdf application, suggesting a lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further stages of an 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.com/wix?keyword=2008+honda+civic+si+owners+manual
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/chegou_o_avivamento_trio_nascimento.pdf
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/vba_excel_tutorial_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/contacts_backup_apk_android.pdf
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/vigimupuxepubevurot.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ec1a1d830b44764a98a65e00688bf9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5156146dd94d42c391dd8b185ecb2520.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa232c00dec347458a860aaa1b17f07f.pdf
    • https://static.usrfiles.com/ugd/b8c837_38b8e9e998144927a6925c43ce30ebbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_15d987383e264efbaaf12855d5cf5ee2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e02fd5b81f1b4eb8909d192f86466ecc.pdf
    • https://static.usrfiles.com/ugd/b8c837_328ba79e8b9c409bb4f14e594c119880.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dac6d33d23745beac1c2bc26ccdf979.pdf
    • https://static.usrfiles.com/ugd/b8c837_85e335e89242484e805564d06a3c0338.pdf
    • https://static.usrfiles.com/ugd/b8c837_52db3154e7c3442d9f3b20996c601b15.pdf
    • https://static.usrfiles.com/ugd/b8c837_83b5581846904130aa0d4c35885f5f10.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bedbac563294d1dbf8d5c7ac7b561d3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a5.bin
2694b74615c1112a6fe50f350cb8308916a025af5d40ca983b905d366d92a5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A5 5508 bytes
font_01_sfnt_off00007924.bin
94bc283f05a0a2a00287ad913d593a75ab68722584f55631e3a6718a046d7a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7924 10068 bytes
font_02_sfnt_off00009b85.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B85 4324 bytes

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