Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ba6e6d481a3658…

MALICIOUS

PDF

45.7 KB Created: 2020-09-02 19:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 084f9eb44dd461ae6834602a0e8cc155 SHA-1: ca5e61dd4f2d7ed14e6f94d9ec95d6e4df1df86e SHA-256: d4ba6e6d481a36586a0c8fd9b5dba8327afeea4cabecf816c1c2516b8f2a0e9f
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The primary malicious URL identified is https://ttraff.com/wix?keyword=drought+in+australia+report, which is likely used to direct users to a harmful 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.com/wix?keyword=drought+in+australia+report
    • https://static.usrfiles.com/ugd/04e6f9_3afc8d06e83348c39cc1389fe823ff9c.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_1c3fc2460411405fbd672722e9428265.pdf
    • https://static.usrfiles.com/ugd/d775a9_a1b1682765484fa8803eef198de2721a.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/2311923689.pdf
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/tube_digestif_humain.pdf
    • https://cdn.shopify.com/s/files/1/0435/9100/8419/files/nuzarexut.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/35168878491.pdf
    • https://cdn.shopify.com/s/files/1/0461/7230/7609/files/bodybuilding_whatsapp_status.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/walisitijatajibozuba.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/32960355942.pdf
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/51600699339.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/lagu_j_rock_ceria_versi_reggae.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/applied_fourier_analysis_hsu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/nedufesuvebimazoreri.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/1543129212.pdf
    • https://cdn.shopify.com/s/files/1/0432/1689/6159/files/kumaxefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/57413705821.pdf
    • https://theconversation.com/recent-australian-droughts-may-be-the-worst-in-800-years-94292
    • 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_off00007547.bin
d62c4ae417dc040678176cc623b8c5a8a73b30f8bfe47fa41489e6c1174ac3e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7547 5080 bytes
font_01_sfnt_off0000868d.bin
8522646b93933cf55f8df2e1c184f1b091ddc731ac2cfe2a4d3dc23844834dae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868D 10472 bytes

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