Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83ada759fa4d7b1…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 00:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4ab332e57e9a7f363d7a6902e37b03c SHA-1: 5ba987cf191627bb9ebba3ee9ff3abebba539ed8 SHA-256: f83ada759fa4d7b1bcff69ffe0be48d5ad04bbdfded9e8d31af686bf65789bb7
152 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, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Play prince of persia 2 online' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=play+prince+of+persia+2+online
    • https://cdn.shopify.com/s/files/1/0432/6581/8782/files/ronulevudobuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/teligupupupagurarunumifu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/fedatadoworana.pdf
    • https://cdn.shopify.com/s/files/1/0463/1907/5485/files/duxazavegobudelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/apache_cordova_visual_studio_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/bitlocker_for_mac_os_x.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/97003910245.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/cantoral_catolico_con_acordes.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bcff15cfa1c4370b1d950ab64693aab.pdf
    • https://static.usrfiles.com/ugd/913720_2319b261d9474d94bb3b045c23de1516.pdf
    • https://static.usrfiles.com/ugd/b8c837_9861b9e5a22748e091115c8e140b1ca8.pdf
    • https://static.usrfiles.com/ugd/9e14ca_f1d167030a6146d8a39d5c74240bc75e.pdf
    • https://static.usrfiles.com/ugd/9757e7_8d34f7b7234d49d18d30653db07e55da.pdf
    • https://static.usrfiles.com/ugd/b11f6d_f947854b23da4fccae1897e4644b0358.pdf
    • https://static.usrfiles.com/ugd/b8c837_71205bbc53eb4b099c60c9424b31e795.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
1c97cee61e3214fcea567f138ada7059ee905e2445c0253e6792f8f8ab2fa5ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x606B 5244 bytes
font_01_sfnt_off00007254.bin
7f2d96beb308797c1490851a37345df2f451587f04b9d0d5a15a1c22e26ee15e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7254 10212 bytes