Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b3f3efec37f1f8…

MALICIOUS

PDF

39.3 KB Created: 2020-08-24 22:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 829378f59b504d09e3b8e284a71142e4 SHA-1: de6fa0ded422541ddff34c547589807d8eb546c4 SHA-256: 56b3f3efec37f1f8a133ee5e6632d44c377b2c16ce13c79c3e82d039f8949aad
120 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.cc, disguised as a congratulations letter. The document also features a large number of embedded links, many pointing to Shopify domains, likely as part of a link farm to improve search engine ranking for malicious content. The primary malicious URL is https://ttraff.cc/pify?keyword=congratulations+letter+template+for+winner, which is designed to redirect the user to further malicious content.

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/pify?keyword=congratulations+letter+template+for+winner
    • http://sojikupa.futurespresent.com/uploads/1/3/0/9/130969723/4702206.pdf
    • http://kunuruku.breedengallery.com/uploads/1/3/2/7/132740829/7213947.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/munutesupobudilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4791/files/augustus_strong_systematic_theology.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/xuvep.pdf
    • https://cdn.shopify.com/s/files/1/0440/0345/9230/files/battlefront_2_capture_hask_reach_the_platform.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/5050698928.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/zodinutumivaladi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8323/4470/files/consulting_company_business_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/8048/1958/files/netflix_windows_7_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/56713443910.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/introduction_to_mastering_physics_answers.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_off00005cc9.bin
9a04f5aae62c6d13e0f0b6d7dd18f493da0838bc4c3e0747411983b3fa953326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC9 5220 bytes
font_01_sfnt_off00006e89.bin
713944e679584f22c0dc67e0e1c6ada4602a57c85daa8ca7064f65660f370fe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E89 10032 bytes

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