Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd863841f9873f3d…

MALICIOUS

PDF

44.3 KB Created: 2020-07-14 04:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c63516955ab2d36fa8eba3c6bd094b83 SHA-1: a09c2d431e5e139f2f0b56e89fc63dca67a36e2d SHA-256: cd863841f9873f3d74c3cec1258cf7918f5681b469f28d7ceaedc44dd1341777
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.ru'. Additionally, it exhibits a PDF link farm, with numerous links pointing to various domains, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a 'Download Button' heuristic further supports a lure-based attack. 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.
  • 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=convert%20pdf%20to%20powerpoint%20using%20adobe%20acrobat%20pro
    • http://files.friendsofthefergusonforest.ca/uploads/1/3/0/8/130874063/tuson-vosesemajuf-wasatofadivi-togutuzekizi.pdf
    • http://files.gfhsmt1964.com/uploads/1/3/2/7/132741149/labikobufefezij_liwagexivawo.pdf
    • http://files.yoganess.net/uploads/1/3/1/8/131857914/wapezavazunon_tufurizod.pdf
    • http://files.stonesj.org/uploads/1/3/1/4/131453718/2883092.pdf
    • http://files.kellymgriffin.com/uploads/1/3/1/4/131437552/212082.pdf
    • http://files.cdastars.com/uploads/1/3/2/6/132696233/balifetu_kajogigevodur.pdf
    • https://nuzadoparuxu.files.wordpress.com/2020/07/93787912187.pdf
    • https://bimirofi.files.wordpress.com/2020/06/bufum.pdf
    • https://tixobumot.files.wordpress.com/2020/06/jikududunutiwosi.pdf
    • https://talugunika.files.wordpress.com/2020/06/77096586739.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/21425786644.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/romekerutibozigep.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/legizalisebezekunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/58322939119.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/82611136415.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/buvetixu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/69319037750.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/69308560623.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/
    • https://nuzadoparuxu.files.wordpress.com/2020/07/93

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e94.bin
fc4945fc8a485bf47ba0b79f37ec22801f953394d9ae858ded299d53cee7258b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E94 5488 bytes
font_01_sfnt_off00008163.bin
767d608a9069021043a6ec988d7305740d05d8c7a11d931f46d60f1918cefe50
pdf-font-stream PDF embedded font (sfnt) at offset 0x8163 10444 bytes