Malicious PDF — malware analysis report

Static analysis result for SHA-256 4768cc40eb7d5008…

MALICIOUS

PDF

45.9 KB Created: 2020-07-16 01:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 861ac26ee516cf61da5de01245200ca5 SHA-1: 5d1711af7b5f54169fd0bbf72a02404433f6deba SHA-256: 4768cc40eb7d50083dc9d4104809d087fc6163ed80661633bc40b10e868a22d2
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to converting PDF to PowerPoint, suggesting a lure. The presence of numerous embedded links, including a link farm hosted on Shopify, further indicates a malicious workflow designed to drive traffic to potentially harmful sites.

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/wb?keyword=how%20to%20convert%20a%20pdf%20document%20into%20a%20powerpoint%20presentation
    • http://files.rone.studio/uploads/1/3/1/3/131379266/gopijiwupevutekifari.pdf
    • http://files.cuamusic.com/uploads/1/3/0/7/130738841/2676145.pdf
    • http://files.drumcrimewatch.com/uploads/1/3/1/4/131452806/8362254.pdf
    • http://files.lovelaurenalexa.com/uploads/1/3/1/8/131856531/binupaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vabagibad.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/zazaxewejulumevagufip.pdf
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/riseravukudukuf.pdf
    • https://virebon.files.wordpress.com/2020/06/36662854198.pdf
    • https://mixowunajux.files.wordpress.com/2020/07/67096934795.pdf
    • https://buvixewumus.files.wordpress.com/2020/06/batufepidewexabikitexod.pdf
    • https://puroxil.files.wordpress.com/2020/07/97106472375.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56325204281.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8695/files/xotedozurotizisebigojirik.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/jafaxanusebikeserivite.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/8989746292.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/togotonawesidifananizuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/3839/1970/files/86422824230.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6914/files/wuretevexefasavirore.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/50692879073.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/43281889150.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_off000075fa.bin
291f153440db9638aa3430da420ceb5b110960bed335810dbab4aba7d1539bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 5264 bytes
font_01_sfnt_off000087d3.bin
b94f2b8bb2f19b6d08832040584f163fd58bd415ef7c3563ccc03094c6fcde55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D3 9800 bytes

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