Malicious PDF — malware analysis report

Static analysis result for SHA-256 4333806b8c7731fb…

MALICIOUS

PDF

41.5 KB Created: 2020-08-02 11:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e2d893b9ec8b492a594d555ee24b31e SHA-1: 8a66cc2f03ae5954f7ab2389ed1f0119a2ebc7c7 SHA-256: 4333806b8c7731fb1737d4efa56e465b4324f9904611f088589a89f855bd6bd2
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body contains the primary redirect URL and numerous other PDF links, suggesting a lure to external malicious content. No scripts were extracted, but the structure strongly indicates a phishing or scam attempt leveraging a large number of outbound links.

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.com/pify?keyword=classic+warrior+guide In PDF document text
    • http://files.terryrich.co.uk/uploads/1/3/0/7/130775063/6612970.pdfIn PDF document text
    • http://files.symbolicartcenter.com/uploads/1/3/1/4/131407977/doduguzoduridevoj.pdfIn PDF document text
    • http://files.cartwheelsgymnastics.com/uploads/1/3/1/3/131379959/rirasobemokeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/19148877310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/witudojoruwudarufef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vozazugimutiwobawaxuleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/27627895146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8604/4572/files/little_miss_muffet_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3951/4006/files/astronomy_merit_badge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/mixufirogidototo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/76026133355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/76925930112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/tidupimidifivaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/58708460764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/zegobebexosepubebo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006538.bin
4545eda714cea6f1ae34f5879ca85df1863dd2f7bab624f72edfc20a0381a2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6538 5104 bytes
font_01_sfnt_off000076a8.bin
385bbfc4b43360bae5b2f0967462236e347e56a17ea2b4c96a626168b3a58a81
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 10276 bytes