Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcd6c63bdac50aa…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 23:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ac67dad8f8184414491a163b7222b46 SHA-1: b30500c66a7db932e67f037e74e2447e9aa0e15d SHA-256: bdcd6c63bdac50aac929d4a0d6857ce44281d5022beec5ff3398781313aa782b
120 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=mediaf%25C4%25B1re+undertale+android, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the same URL and benign-looking PDF files hosted on Shopify, suggesting a lure to disguise the malicious redirector.

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=mediaf%25C4%25B1re+undertale+android
    • http://davujubun.cosmorotica.com/uploads/1/3/1/3/131383483/1d86a37.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/43572440960.pdf
    • https://cdn.shopify.com/s/files/1/0428/9747/3699/files/laws_of_reflection_and_refraction_of_light.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/kenmore_air_conditioner_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/63843752493.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/52418406052.pdf
    • https://cdn.shopify.com/s/files/1/0432/1099/7921/files/2828396425.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/3580696538.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/ririjukanobobofebixupis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/buku_manual_canon_eos_600d_bahasa_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/11416193565.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/22240845363.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/gotavotosododutiwuko.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1017/files/58162889691.pdf
    • https://cdn.shopify.com/s/files/1/0438/9080/2856/files/gijofubosoriwamadalag.pdf
    • https://cdn.shopify.com/s/files/1/0449/1840/7335/files/cardiopatia_reumatica.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_off00005f02.bin
8050fa189a100bd80a949ecbaa4a50432ecb4031d324a88fac6e06b862657c79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F02 4760 bytes
font_01_sfnt_off00006f4a.bin
94abbd810447a694756011f9d8bc22f6f93aef3d9e751ac160ed1eb6de894306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4A 11044 bytes

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