Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65324b2b2af865a…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 17:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d14de78198e936ca6bdf9fc48769c77 SHA-1: fd2f2260c106e1ce7f2f99ba34447b24c928cddd SHA-256: f65324b2b2af865a9b42242e63538976b9a34f15e1fd9f5ebe0594360ec4c6e6
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One of the primary URLs, 'https://ttraff.cc/wix?keyword=contenidos+conceptuales+procedimenta', is flagged as a known malicious redirector. While many other links point to benign Shopify domains, the presence of the malicious redirector is a strong indicator of malicious intent. No scripts were extracted, and the document body contained mostly garbled data and embedded URLs.

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=contenidos+conceptuales+procedimenta
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/metafisica_aristoteles_valentin_garcia_yebra.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/nevipovimanalesalogogiki.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/possum_hollow_bore_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/zaxosijafotiwitigazex.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/31779366168.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/18377175407.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/fiwodenopozufujivodasov.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/24634459035.pdf
    • https://cdn.shopify.com/s/files/1/0431/7662/4279/files/epdm_rubber_sheet_3mm.pdf
    • https://cdn.shopify.com/s/files/1/0438/9722/5368/files/73129338907.pdf
    • https://cdn.shopify.com/s/files/1/0431/1013/8017/files/26697268760.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/39509678007.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/amazon_kindle_cloud_reader_to.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_off00005d9a.bin
ae37d9906f1969577a4a060a0a5e35e2cff8a6646a809705a43d7ca231034cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9A 5124 bytes
font_01_sfnt_off00006eeb.bin
75b5588fbe1feea7855622f08b10131d58c9cdb48d40c31d9ec96f3b9ec4819a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEB 10976 bytes

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