Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db64fc79110b5c3…

MALICIOUS

PDF

43.5 KB Created: 2020-09-01 00:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b68614e9b8450e525f7bb8fb21aa6a7 SHA-1: b235c898c6c25d7485159dc845fc7372f6d9a22c SHA-256: 4db64fc79110b5c3c8ac4b3f8c821fad4d08a7d8357be00cb7e2e06dfd8703a4
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text suggesting it is related to 'ICS 200 test questions and answers', likely a lure to entice users to click the malicious link. The presence of a malicious redirector link indicates an attempt to lead the user to a site hosting further malicious content or phishing pages.

Heuristics 3

  • 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.
  • 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/wix?keyword=ics+200+test+questions+and+answers
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/lijewukagijufogeladaritu.pdf
    • https://cdn.shopify.com/s/files/1/0462/9236/9569/files/pexiwivelafegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4098/1660/files/rekotawiwumuwef.pdf
    • https://cdn.shopify.com/s/files/1/0438/3231/1968/files/90296276131.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/28587773321.pdf
    • https://cdn.shopify.com/s/files/1/0439/4038/0840/files/vuraronuvagaluz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/23863061034.pdf
    • https://cdn.shopify.com/s/files/1/0447/6325/0839/files/western_blotting_principle_and_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/strategic_management_bba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7542/files/retududogevefisiviteve.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/lutotoxosuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/wasixijenutozunusinefi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/64935208830.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/70764251907.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.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_off00006bf6.bin
45078fd383d80d10cd330e771e3020e92e0a45299e9574088cd7b435f20a6b71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF6 5328 bytes
font_01_sfnt_off00007e37.bin
cc2c855bda77c108da17fcc280c8af7a586f1d561e3acaef99fa14057698cc8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E37 10244 bytes

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