Malicious PDF — malware analysis report

Static analysis result for SHA-256 debe80fe67fee3f0…

MALICIOUS

PDF

38.5 KB Created: 2020-09-01 02:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c83e982f41f50b419499b479e1db504 SHA-1: 9af4051ba3b1f718be227b8bdfb738f5094a5386 SHA-256: debe80fe67fee3f0389102323d84fad27fd9c5cf682d6ea98fd8fa256c7b28cc
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised with a search query related to school uniforms. This suggests a phishing or social engineering attack aimed at tricking users into visiting malicious sites. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious activity is the redirection via the embedded URL.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=broadlands+academy+school+uniform
    • https://cdn.shopify.com/s/files/1/0448/6791/1842/files/fusionner_plusieurs_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/sadopagise.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0717/files/bexafasaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/scales_and_arpeggios_for_flute.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/wufivimunumaxajudef.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/wot_mods_9._8.pdf
    • https://cdn.shopify.com/s/files/1/0440/8911/4789/files/wejejarinizoge.pdf
    • https://cdn.shopify.com/s/files/1/0436/0614/7230/files/jijugejaxivakoxurekukabiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/4474021515.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/four_food_groups_canada_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0461/3482/1032/files/chal_chaiya_chaiya_instrumental_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/vorefiberizedus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/16283734543.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/52010300743.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5237/files/xogopobekuwobo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3362/3708/files/80050714958.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5966/files/nizipeporezunopivaweg.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/jokapopamobezoritoxa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bfa.bin
c288dfe439540702ba924f5a3d61d0bb1a430e8614b9c41188adf38c9322f52f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BFA 5216 bytes
font_01_sfnt_off00005d7f.bin
b11b085c9a045067e63e424b45fd9b62c2d36b7d2056959e076cae4d42dbfba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7F 9740 bytes
font_02_sfnt_off00007ed7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED7 4324 bytes

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