Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccf6378cf98fbe7…

MALICIOUS

PDF

33.4 KB Created: 2020-08-06 08:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f35a27e142b37e71a769c9022efe244e SHA-1: 178dc48955d3470fd7cd0b56792f1cb2174b7ba3 SHA-256: fccf6378cf98fbe702943029d65ca86744e10f1b867f4e86b3e9f6b4e6d709e4
152 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, which is indicative of a link farm designed to manipulate search engine results or distribute malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=api+20ne+biomerieux+pdf'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=api+20ne+biomerieux+pdf
    • http://walik.tifanylee.com/uploads/1/3/1/3/131379730/697b2d.pdf
    • http://files.hazelandbluedesignstudio.com/uploads/1/3/2/6/132682239/jojox_janegiz_xixunogu.pdf
    • http://files.westlanefitness.com/uploads/1/3/0/8/130874520/segosexazujoba.pdf
    • http://files.blog.saradeckard.com/uploads/1/3/2/6/132695572/1108863.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/gipulew.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/rizikizolobizotu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/ravozupurofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/82263874521.pdf
    • https://cdn.shopify.com/s/files/1/0448/4068/1633/files/final_fantasy_x_rom.pdf
    • https://cdn.shopify.com/s/files/1/0431/8711/0037/files/61288298093.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/bewuxunafilasukejebem.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/taralobadetatadedetipil.pdf
    • https://cdn.shopify.com/s/files/1/0428/2528/5791/files/sotebilekukomonakawuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3899/files/sabawube.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/security_risk_in_cloud_computing.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/71897399780.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/rexunakopoxaxogasesaxisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/cerebral_palsy_ataxia.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_off000045d6.bin
a6d41c6af0588f33c19772e8dc699634b169697c659f61b95e7e399083bba33a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45D6 5236 bytes
font_01_sfnt_off00005795.bin
bd476313b3d97a27e059758cfd5362a0b4d37400bb77e95e483e808b892f8d74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5795 9628 bytes

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