Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd65303fa099dd3…

MALICIOUS

PDF

41.3 KB Created: 2020-09-02 20:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d326b9a4a52eee48bc45304f21b6b096 SHA-1: de157085cc6a93715e3d60f0e2ce192e77611e06 SHA-256: 5bd65303fa099dd34450b84d9dc0c099db891935b67f87c87a46261dea699360
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDF files, forming a link farm. One of these links, https://ttraff.com/wix?keyword=moto+x4+android+one+review+2019, is identified as a malicious redirector. This suggests the document is part of a SEO poisoning or link farm attack designed to redirect users to malicious infrastructure.

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=moto+x4+android+one+review+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/how_to_make_a_followage_command.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/61464133568.pdf
    • https://cdn.shopify.com/s/files/1/0458/5973/3657/files/main_idea_and_supporting_details_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/46884493088.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/13776528521.pdf
    • https://static.usrfiles.com/ugd/ecd213_eb6d7bd7c2c6410fb178729c154a6d3a.pdf
    • https://static.usrfiles.com/ugd/3e5d97_7bb55e5622c744428b63e4d505550782.pdf
    • https://static.usrfiles.com/ugd/eb6612_00841f19e8004560a50c32ed26597807.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9452/files/delimubaden.pdf
    • https://cdn.shopify.com/s/files/1/0459/6999/7984/files/kujelu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000622a.bin
5ccda0b87c75031c999ee857a116d01465bdd3cab437ce12fedb56020eea32b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622A 5404 bytes
font_01_sfnt_off000074c5.bin
efc67a65ef1834def0f346bdc181377622456d939e6929caa04c6d8caccfdff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C5 10556 bytes

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