Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8baefff80fa244…

MALICIOUS

PDF

35.0 KB Created: 2020-08-10 23:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 158f84640a7af0829cc7c050be8e0418 SHA-1: c22e5a8c5fe7de18fc0046019b2e80a7afa168fd SHA-256: 3e8baefff80fa244d454acc0ca49bc0abae382148f1298bc4acda52a0fee6ebc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to funnel users to other sites. The document also features a large number of external links, many pointing to Shopify domains, suggesting a link farm intended to obscure the ultimate destination. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a malicious redirection scheme.

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=the+search+avatar+pdf+download
    • http://files.classicallivinghistoryforkids.com/uploads/1/3/1/0/131069869/jalopez-dafenonetixiro-nusalaretok-nigakelukegep.pdf
    • http://filobazi.drchristopherschuster.com/uploads/1/3/1/4/131482995/1121375.pdf
    • http://files.embracethebeauty.net/uploads/1/3/0/7/130775583/fimudile.pdf
    • http://files.sannihirvonen.com/uploads/1/3/1/6/131606115/b89a7.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/40716960907.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/90747526731.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/narraciones_extraordinarias_el_barril_de_amontillado.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/south_african_cocktail_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/bopifumalaxejuvifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/96581132980.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/81070272702.pdf
    • https://cdn.shopify.com/s/files/1/0436/4615/6960/files/31569939231.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/72676266971.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/zujona.pdf
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/93505919683.pdf
    • https://cdn.shopify.com/s/files/1/0440/2210/4222/files/70671256929.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/baliwodagazuduruvosebujog.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_off00004a1e.bin
75ce0406ebcbe45defc9c6d88b34469932e445a1b049bf2915254a2168fa0319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A1E 5344 bytes
font_01_sfnt_off00005c58.bin
3de9126096c88399383b9ba67557631cb5d7f3e2194e0360a8959c17457e704b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C58 10252 bytes

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