Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5357b23f520b2d…

MALICIOUS

PDF

49.6 KB Created: 2020-07-16 17:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fe190e79d69610e71ef9a965a139048 SHA-1: 6c9950870d4516df90fbea82b361c0cedc3e4313 SHA-256: 8a5357b23f520b2d6209b2084a89b39cd427476d03ea7150a33d6a9f34063b09
140 Risk Score

Malware Insights

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

The PDF contains a large number of links to external PDF files, a technique often used for SEO manipulation or to host malicious content. One critical heuristic indicates a link to known malicious redirector infrastructure. Another heuristic flags the document as a callback phishing lure, suggesting it may prompt the user to call a number for fake support or to resolve a fraudulent charge. No scripts were extracted from this sample.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=program%20festival%20enescu%202017%20pdf
    • http://files.pearladamswgi.com/uploads/1/3/1/1/131164090/dilupavunadixot.pdf
    • http://files.mitchellmillermusic.com/uploads/1/3/1/3/131398222/408135.pdf
    • http://files.launcestonlittleathleticscentre.org/uploads/1/3/0/8/130813768/2969109.pdf
    • http://files.braverthanthewaves.com/uploads/1/3/1/4/131453807/5359755.pdf
    • http://files.acjs-mws.org/uploads/1/3/1/3/131379134/104b8f3f.pdf
    • http://files.mybabybooksa.com/uploads/1/3/1/3/131380337/2c139b8cfe6a.pdf
    • http://files.campmi.org/uploads/1/3/1/4/131405948/junewowufonunuvoger.pdf
    • http://files.biddingerlab.org/uploads/1/3/1/4/131437976/1803646.pdf
    • http://files.joemillsaps.com/uploads/1/3/0/7/130739457/2f4d954.pdf
    • http://files.biddingerlab.org/uploads/1/3/1/4/131437976/18036
    • https://tixobumot.files.wordpress.com/2020/07/kubuk.pdf
    • https://dupalusojo.files.wordpress.com/2020/06/dixuxop.pdf
    • https://zigozeposuze.files.wordpress.com/2020/06/lefewanexiwegodagawe.pdf
    • https://dojivoxavinu.files.wordpress.com/2020/06/feroxukesuneb.pdf
    • https://cdn.shopify.com/s/files/1/0437/3151/7605/files/xokilaloxonuzibekutukexaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/50439832448.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/75179799764.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/suviraripeforufenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/tojefafinalegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7618/files/39499557719.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/91000257843.pdf
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/76405009036.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.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_off00007f7c.bin
c9fb681ad4bc1cde103a78d4cd55debdcfc05673fbf075d13252b626ad131866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 5824 bytes
font_01_sfnt_off00009344.bin
bd4f9ea39e4bbd8e9c602a6b69b3c7a11af714df5c2a8fcbf94fb3743586b1e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9344 11420 bytes

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