Malicious PDF — malware analysis report

Static analysis result for SHA-256 949313272ccdd253…

MALICIOUS

PDF

32.1 KB Created: 2020-08-30 19:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4450c3d38bb30e75e1b65dbca3d3a80 SHA-1: 938cd101af0907ee955f4ed72e23f6643954752a SHA-256: 949313272ccdd253eb20f513302bb60c3ea54bbf8272dba9ba9916a976930b54
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document exhibits characteristics of a malicious redirector and link farm. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that it contains links pointing to known malicious infrastructure, specifically 'https://ttraff.ru/wix?keyword=coraline+2+full+movie+english'. Additionally, PDF_SEO_LINK_FARM suggests a large number of embedded links, with 'https://static.usrfiles.com/ugd/bf650e_67e088695b484eb5a69f368d4a9d9bb9.pdf' being the first identified. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains these URLs, reinforcing the attack pattern.

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=coraline+2+full+movie+english
    • https://static.usrfiles.com/ugd/bf650e_67e088695b484eb5a69f368d4a9d9bb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_95420d694e0a40de886ba18e1d17b003.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b978cba329c4ad791d0f43ec05f9913.pdf
    • https://static.usrfiles.com/ugd/c836c3_37f118aeb611418781cea59622f8a232.pdf
    • https://cdn.shopify.com/s/files/1/0433/7605/0330/files/24080498517.pdf
    • https://static.usrfiles.com/ugd/362633_548ebfd4068349139b39a9e7d02bd3e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_f453484c0fce4c15bf2363b5383b5521.pdf
    • https://static.usrfiles.com/ugd/253000_6f9ac9cd50624d8c933c5210a3fb0455.pdf
    • https://static.usrfiles.com/ugd/5ed537_85d4f4f702f94b8da0874a3682b3b07a.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_off00004044.bin
2d93b0de6a4db8201f71cbf1d12c49cb008dacc9849965b495ba56c30df610a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4044 5276 bytes
font_01_sfnt_off00005211.bin
71af6fe47135d825c40f4cf8020d4e158e1eeef827966be2b8c0b67624f2ef8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5211 9968 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.