Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21e0ac1d498af2b…

MALICIOUS

PDF

41.9 KB Created: 2020-07-26 16:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 743f7b802532941ae5d8c85f1046c3fe SHA-1: 355c4756acc191354f91b11daf911a345a5f5bdb SHA-256: d21e0ac1d498af2b032951350c84405ec40227df0d29419be81345b4aeb214f0
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, one of which is to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text related to a movie title and the authoring application, suggesting a lure. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the attack pattern of tricking the user into clicking a malicious link.

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/pify?keyword=mr.+bechara+full+movie+720p+free
    • http://files.brentridgecommunity.com/uploads/1/3/1/8/131871704/revuliwituvo.pdf
    • http://files.anthonylaurienti.com/uploads/1/3/1/1/131163492/repusomadufapu.pdf
    • http://files.jimandbuns.com/uploads/1/3/1/1/131163896/xofuvotixodoge-voveveguxo-pozori.pdf
    • http://files.saikmusic.org/uploads/1/3/2/7/132740415/67c8893d65fe7.pdf
    • http://files.eleanorroseoutdoorquiltshow.com/uploads/1/3/1/3/131398430/devatujuroxum-jonasudidif-xopilifalu.pdf
    • http://files.anthonylaurienti.com/uploads/1/3/1/1/13116349
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/potapafiledebosulexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4250/3832/files/liregifamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/degerefamexiseb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/36173141357.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81397135942.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/gokejunajuduxilarubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/mutonuwobufa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1877/files/87404077640.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/53097497079.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/kusuzeladijavujenobe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/talozomo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/mijapimivoxerunadem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/33017587873.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/jejemerojani.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_off00006291.bin
e8af48a1cbae7101ce05cb4bbaaa42bdf5d91014d31b4b69f2f500a1d6cbd6dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 5364 bytes
font_01_sfnt_off000074e5.bin
5fecea556aa325734b66f4a964786c96a30c48473b67a21375547ef50354f65e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E5 10528 bytes

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