Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fe66d2f43925a9…

MALICIOUS

PDF

41.6 KB Created: 2020-08-07 12:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e194bd7d3ffef02e163409844e0e55a SHA-1: 7919727d7a0c5b13aefcbfed1f0322c9ce55cb91 SHA-256: a4fe66d2f43925a99c2ba0a05edcc1947a7f6e4b2bf99c99e5b81be6c12a1afe
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a legitimate document. It also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to obscure the true malicious destination. The primary malicious link is https://ttraff.com/pify?keyword=assessment+for+learning+tools+pdf.

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.com/pify?keyword=assessment+for+learning+tools+pdf
    • http://files.sarahsiegler.com/uploads/1/3/1/4/131454034/8f16051.pdf
    • http://files.btfgcbh.net/uploads/1/3/1/4/131454024/6561954.pdf
    • http://files.pestcontrolbrampton.org/uploads/1/3/1/3/131378899/sukal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/faa_aviation_weather_services.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/42770803386.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/lodikolasaboxala.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0215/files/8317982217.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/16686744619.pdf
    • https://cdn.shopify.com/s/files/1/0437/3607/2341/files/xevogakafirifemuwiwoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/61692456409.pdf
    • https://cdn.shopify.com/s/files/1/0446/5927/7987/files/arifureta_novela_web.pdf
    • https://cdn.shopify.com/s/files/1/0433/0363/3051/files/nomigivideja.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5978/files/jabubome.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/fatboss_trial_of_valor.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_off00006352.bin
178c46bb82652123f184346a9600178cf1201ea78967224c400f26dfcd848934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 5348 bytes
font_01_sfnt_off0000756a.bin
54fe87e29e5951df690c233fee577d0a3646685f7dee174595aff846590e63e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756A 10628 bytes

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