Malicious PDF — malware analysis report

Static analysis result for SHA-256 09308a81ffa4f30d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-09 05:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85cbcc9728f66a41d86e644b68e70951 SHA-1: 69a97a9c10d2d4964c80916d4a90474d120a935b SHA-256: 09308a81ffa4f30d72ac6082ca69957b462addc2f2e129cda9144ef104ab86af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but the primary malicious link directs to a ttraff.com redirector. This suggests an attempt to drive traffic to malicious content, possibly for phishing or malware distribution. The ML classifier strongly supports the malicious nature of the file.

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/pify?keyword=electronic+ignition+system+pdf
    • http://files.kerrionmission.com/uploads/1/3/2/6/132681452/wepodamus.pdf
    • http://files.harujang.com/uploads/1/3/1/0/131070590/1128218.pdf
    • http://files.amandaraebeauty.com/uploads/1/3/1/1/131163684/314890.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/apsrtc_bus_pass_application_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4528/9127/files/25860238940.pdf
    • https://cdn.shopify.com/s/files/1/0431/2986/4343/files/sudagukutojabizixasumusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/gubovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8078/files/wakavow.pdf
    • https://cdn.shopify.com/s/files/1/0436/4114/3454/files/navy_seals_fitness.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/26439951675.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/rocket_propulsion_elements_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2963/4970/files/abstract_algebra_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/20190639057.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/ditagulapirulaxuxupumiwez.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/45606728729.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/54208403592.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_off000067b5.bin
4e87c85d2254c41c92ea56dc10f7c0463f05a6f175cda49a0b919cab46914bb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B5 5324 bytes
font_01_sfnt_off000079cf.bin
b92c05857d636707399bbdb36a643518395a8e0c29ae261a6bd44249b207c902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CF 10224 bytes

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