Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80c49a9f1596830…

MALICIOUS

PDF

43.9 KB Created: 2020-09-16 22:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d1b07e1d252e42ce95369d3faac4a02 SHA-1: bb04a27487fbffeb383a86c1598568aa87de4ad1 SHA-256: f80c49a9f15968303f49210af19fdc0a3560d5bd52869f6388fb8a7716651a6f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and appear to be part of a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.me/wix?keyword=gigabyte+ga-z97x-sli+cpu+support+list', suggests a lure related to hardware support, aiming to trick users into clicking. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that at least one of these links leads to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=gigabyte+ga-z97x-sli+cpu+support+list
    • http://kavuje.surbhibansal.com/uploads/1/3/1/8/131857920/kezaz.pdf
    • http://kolokizu.windycityknittingguild.com/uploads/1/3/1/4/131453060/3233703.pdf
    • http://dulanozog.bowentherapyandreflexology.com.au/uploads/1/3/0/9/130969060/duluzawusosiv_resubibenasoru_tibez.pdf
    • http://files.beercityrecovery.com/uploads/1/3/0/8/130874627/dalid-lipemuru-lupuludomosam-pixotaserowi.pdf
    • http://files.dornbush.net/uploads/1/3/1/3/131380687/sixotofagafi_mobami.pdf
    • https://4ee66d2d-49f8-4879-89ce-7f4bad3f9cf4.filesusr.com/ugd/f35da0_578f9891caed44bd806fc3bb6f40669d.pdf?index=true
    • https://d70413e0-3bb9-4f39-8575-5bc38067ce2d.filesusr.com/ugd/55e2c6_794fcfb1d1f9457aaa95d0080e5dcd3e.pdf?index=true
    • https://20b44dae-efa8-4908-84df-f6bc35aeb94e.filesusr.com/ugd/f1780b_8b623f9a634c4eec8c76f8f863d2aa11.pdf?index=true
    • https://12f0ee19-39f6-4cf8-98f9-2776ea0f7c43.filesusr.com/ugd/15ebe2_df65c1b45696429e9265ea020902d420.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/88531240550.pdf
    • https://cdn.shopify.com/s/files/1/0434/1556/8546/files/kogolilumuxejosimag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/80317887053.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_off00006943.bin
88dc139204ed4be03481e846f60db275c942607e645da31cdafe5f5b8f4c6c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6943 5760 bytes
font_01_sfnt_off00007d18.bin
a152a47f7502824494da67fd133bb3f357704559485030a629157d9f4b879344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D18 10548 bytes

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