Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ada8d2d4d6f8447…

MALICIOUS

PDF

42.5 KB Created: 2020-08-13 23:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5319a5a368313f5747c3b2d97ba70d49 SHA-1: ba0ed384f3bea6e0307cfe4e4d2e48e572c5748d SHA-256: 6ada8d2d4d6f844725905437e034f4ec84bcf06ec45165f9f13bed7d07505aae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=poweredge+r710+ethernet+driver', likely leads to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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.cc/pify?keyword=poweredge+r710+ethernet+driver
    • http://files.theangelinstitute.com/uploads/1/3/1/4/131454255/marapi_jerafi_rerekinenireded.pdf
    • http://files.yranchcattle.com/uploads/1/3/0/7/130775109/8f5c82ca.pdf
    • http://files.highway417-aviationtohuntclub.com/uploads/1/3/0/7/130775470/samel_botoz.pdf
    • http://files.budreau.ca/uploads/1/3/0/9/130969791/5846279.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1674/8190/files/77987474469.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/vomapigokogajelejovubagew.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/fezukuboba.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/tumitujujodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8357/files/zuxuzuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4060/4314/files/dusedusesonojilibasonevis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/41784595466.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/dojok.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/75593934151.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/voretara.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/controls_and_variables_spongebob_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0450/5174/0310/files/a_new_beginning_with_god.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_off00005f9a.bin
88a4dcf4c85775ad8eeeaeddda0f644c59f5a141798ab7ab90b8c8a840d778a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9A 5092 bytes
font_01_sfnt_off00007111.bin
c5d17f8afa0f22bafbc5c5c0487b40d10c148ece10cd437cb48206b789d772df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 14368 bytes

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