Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eaecc240b3ecf69…

MALICIOUS

PDF

37.5 KB Created: 2020-08-31 20:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 222c9d8ec0e6f56af2e87ee0fd45a064 SHA-1: 807edf47b0916ae68ec043560dc02d05d0d126d5 SHA-256: 8eaecc240b3ecf695820e3ac8baaf0558e5f1ed7175711c3710e803fb053eaf1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=music+lesson+flyer+templates+free+word'. This URL is likely used to redirect users to a phishing or malware distribution site. The document also contains a large number of external PDF links, many hosted on static.usrfiles.com, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

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.club/wix?keyword=music+lesson+flyer+templates+free+word
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/69530597525.pdf
    • https://cdn.shopify.com/s/files/1/0452/2305/1424/files/60933613890.pdf
    • https://cdn.shopify.com/s/files/1/0438/5092/4182/files/lonibozije.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/paulo_coelho_hippie_espaol.pdf
    • https://static.usrfiles.com/ugd/b65acf_3ea99404a33e492a82c3b77e1b19fc81.pdf
    • https://static.usrfiles.com/ugd/87fdc7_e1497a65fd6e42a593d87c4f9f0a4d96.pdf
    • https://static.usrfiles.com/ugd/b8c837_7056f474405147048f057f18428ca38b.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_65f2d5a5ea624e5c8c74d45e5a2662c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_67c5535f64cc4a94b305c7f231320b18.pdf
    • https://static.usrfiles.com/ugd/191a6d_18df8253c85b4d8ab070a44ae9c192f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_809096bc45d647aabe6144a7a1001dca.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_off0000531b.bin
65a94d3a8f7f4a67e0db69b03babb3621cc8c2e8030600f0e59cf853bb6d0d68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x531B 5500 bytes
font_01_sfnt_off000065dc.bin
234f489d42c50db8b023d4217b62350b143a5570d323906bded6917fed1256b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DC 10488 bytes

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