Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06f2035ff84a778…

MALICIOUS

PDF

43.9 KB Created: 2020-08-01 06:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03b44d5b7f1e68d72cf90e001f3e4589 SHA-1: 86f9b80915f2fe0927d74fe4e56c04d0994b31b2 SHA-256: f06f2035ff84a778e5a963d1aacb8a3b4f967b953cfc639399de16659a8b71fa
150 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, specifically pointing to 'https://ttraff.ru/pify?keyword=topcon+total+station+manual+pdf'. This indicates an attempt to direct the user to a harmful site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, suggesting a tactic to obscure the final malicious destination. 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.ru/pify?keyword=topcon+total+station+manual+pdf
    • http://files.itsasign.biz/uploads/1/3/1/6/131606396/vamutatalotelu.pdf
    • http://files.sevoparis.fr/uploads/1/3/2/6/132681296/b220f508e.pdf
    • http://files.chapstickdiaries.com/uploads/1/3/1/8/131856333/9026f.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/18940920731.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/polaris_pool_cleaner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6930/files/sikomerovimamine.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8167/files/89550447766.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/51652007510.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/wokexuzunulet.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/renesezebewovimijekuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/feviratidanej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nimapudusakodinufuzexive.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/psychology_david_myers_10th_edition_download.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_off0000606b.bin
d2a732b06ce8ca984f34a7d023d46a135f7df569cfb07b8fa0d023e84fddfc5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606B 5156 bytes
font_01_sfnt_off000071e6.bin
9047152432130983a780438224f8c442302dd2f7ec002f8737563c4ebc9b57c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E6 15280 bytes

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