Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7bb1253496d6f1…

MALICIOUS

PDF

37.9 KB Created: 2020-09-02 02:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2ab1c29bd37f85944ef5b06a29014be SHA-1: 4103f4a82693e4e90798ce977232b8234beb7af0 SHA-256: ad7bb1253496d6f111e329d606515e9c0fce7804d803d3567784466cac6a4a7a
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, specifically 'https://ttraff.me/wix?keyword=kerry+tj+logistics+company+limited+annual+report'. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Kerry tj logistics company limited annual report' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links further indicates a link farm designed to obscure the ultimate destination.

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=kerry+tj+logistics+company+limited+annual+report
    • https://static.usrfiles.com/ugd/b8c837_d143e347cb6f40d6897c1cffc41a7f4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e02fd5b81f1b4eb8909d192f86466ecc.pdf
    • https://static.usrfiles.com/ugd/769f78_aebb4331ac43439998890c8110439b3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a3ad819ca7040918230151a692985cc.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_b227f96464154cf187c2c625aadc3373.pdf
    • https://static.usrfiles.com/ugd/aff7ca_a911626cbed24d7c90d242eadb15d104.pdf
    • https://static.usrfiles.com/ugd/ca300b_86a26b698ad74ec4b8b137e06c8dedce.pdf
    • https://static.usrfiles.com/ugd/b8c837_295504e368084fa4823ef55b4eb52df5.pdf
    • https://static.usrfiles.com/ugd/2f07a1_a170b6595a634e47aafc34736b4c1a4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_01e1234bd0d24316aa0dcd253e7169a6.pdf
    • https://static.usrfiles.com/ugd/1f6d71_84253a06ca784c0f8e5d8fb219da2871.pdf
    • https://static.usrfiles.com/ugd/ee6770_f4457b0a2b4d494788098bc2fb90e5a2.pdf
    • https://static.usrfiles.com/ugd/4479ed_d2d3aedb3777457f867011e81e76abf7.pdf
    • https://static.usrfiles.com/ugd/f8de3e_1cc25bf4d2214517a7683f860dc34fce.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a2b4f95692f4b54b6e802b59bb32fc5.pdf
    • https://static.usrfiles.com/ugd/c63dba_331d28ff2de848c19f2b11e28cb32ae8.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c0b1f739eb242aa9231e83263d6eb70.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_off0000550d.bin
7eb143b726d2960a5e716f2e6a69304fd6c785bfc9493afa73cadab641aa7067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x550D 5540 bytes
font_01_sfnt_off000067e3.bin
72a3d9939f19dbbf5c5947f5063ee2d092d257bd6284f3db3e82afbaa7625037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 10008 bytes

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