Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0220d6cf1598056…

MALICIOUS

PDF

50.5 KB Created: 2020-08-30 18:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbdaaea5778357f1f8c228cbed9f0952 SHA-1: 0909f560f6e3f0c36b7991825390b03828d1ff8c SHA-256: f0220d6cf15980569bcd2d12809146d5c63840b36f178cdb73b10d9c7f6c4d24
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to static.usrfiles.com, but one critical link directs to ttraff.com, a known malicious redirector. The document body, though heavily obfuscated, contains text related to watching movies online and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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.com/wix?keyword=watch+the+fugitive+online+free+megav
    • https://static.usrfiles.com/ugd/cec570_ab49d99ac1ee4565802199ab88839705.pdf
    • https://static.usrfiles.com/ugd/b8c837_47e9a429be1e4763a90f3b4f09320ff2.pdf
    • https://static.usrfiles.com/ugd/39cb9d_d725f1fed4954a7183fed8fdc912097d.pdf
    • https://static.usrfiles.com/ugd/934fc3_ef7e03c1a51642be84d3a9bf7a22e41f.pdf
    • https://static.usrfiles.com/ugd/760101_b1c4eefe1d684fffb044258ccfc81f00.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5eb5ae4d6544599a977c6d99d24de4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c339c8983be644e3b4c99bf180b96e90.pdf
    • https://static.usrfiles.com/ugd/b8c837_40f228cb438d499f8c547e574de7c43b.pdf
    • https://static.usrfiles.com/ugd/565485_9dddedf558f940ddac2833f579a9f01e.pdf
    • https://static.usrfiles.com/ugd/0a0016_11a40cf1404a4445b3c9ef54c13915e3.pdf
    • https://static.usrfiles.com/ugd/158fb9_29c593b77442447fa8f1524bd7765963.pdf
    • https://static.usrfiles.com/ugd/b8c837_2118bb7747e146ccbc5113a3c7f1e372.pdf
    • https://static.usrfiles.com/ugd/c63dba_d307e56a890e4a36b6e951f3cae85ee0.pdf
    • https://static.usrfiles.com/ugd/d1d005_504042e78202432780c0d4b6a04f7304.pdf
    • https://static.usrfiles.com/ugd/b8c837_33b5473b48854912a814f3597e7a1539.pdf
    • https://static.usrfiles.com/ugd/bf650e_04c212094dc748198eb86251c4e0342b.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_off0000872b.bin
784787f4181155a0ab02f6b8250b616e29b04c494e4494e5dbb3844f34b112b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x872B 5188 bytes
font_01_sfnt_off000098b3.bin
615be5e078f7483965e378c08a4ecd91b512a8ed1b5594aa88ed4598d714ede1
pdf-font-stream PDF embedded font (sfnt) at offset 0x98B3 10644 bytes