Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6b1fc7ea72c328…

MALICIOUS

PDF

37.8 KB Created: 2020-08-04 21:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 462371f2c91f1bc3ca8d04526b700fd2 SHA-1: 46a883135f7ea6f6125ef43645f3aa66d47816c3 SHA-256: 7e6b1fc7ea72c3288faf49c8616e49017c14878d59e349d3d8d756a1bde5063f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is further supported by the presence of numerous embedded URLs. The document body text, though heavily obfuscated, suggests a lure related to a 'Vce general maths textbook pdf'. The primary malicious URL, https://ttraff.com/pify?keyword=vce+general+maths+textbook+pdf, is likely used to redirect the user to a malicious site. No scripts were extracted from this sample.

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.com/pify?keyword=vce+general+maths+textbook+pdf
    • http://files.worldheartsfairtrade.net/uploads/1/3/2/3/132303082/popabuwoxopev.pdf
    • http://xivadef.lorneeckersley.com/uploads/1/3/0/8/130814124/kamupexel-vexexedizese-niwanakazoruwa.pdf
    • http://files.denasheets.com/uploads/1/3/1/3/131379443/e2441bfde585bc.pdf
    • http://files.susanbibulaphotography.com/uploads/1/3/1/3/131380612/poderuxogofizef_guludodet.pdf
    • http://files.fathersweek.com/uploads/1/3/2/7/132710661/3128884.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8545/files/jifuzoruniviwoso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/nuvezubupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/53279885392.pdf
    • https://cdn.shopify.com/s/files/1/0436/9632/4761/files/zerarenoguzigilofobubise.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/32570896409.pdf
    • https://cdn.shopify.com/s/files/1/0431/4919/7472/files/enter_the_gungeon_unfinished_gun.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/48918729613.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/22736120140.pdf
    • https://cdn.shopify.com/s/files/1/0434/6386/8573/files/paretina.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/jisilozukabolobaziper.pdf
    • https://cdn.shopify.com/s/files/1/0437/3869/3797/files/vufisidigimogikironi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/whirlpool_dryer_manual.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_off000054e2.bin
ad641f4feae61c27f6575442affb391dccddeaa361c70cc6f3d995793984af7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E2 5808 bytes
font_01_sfnt_off00006883.bin
be38d32069ec4bf0e4992b85fb23e5a1d0698e49e59f97640a8f2e54cd069ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6883 9896 bytes

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