Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b61fc97d5e74f1…

MALICIOUS

PDF

48.0 KB Created: 2020-08-30 14:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcdadc52b646edd97087020a254b6866 SHA-1: 9a7dabfd8da478d0731dfbcddff9d65d519dd235 SHA-256: d7b61fc97d5e74f1fea41da60a257baf0cdc33b4fb848cf51ad757f4f4a3c47a
152 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, ttraff.ru. The document body, though heavily obfuscated, appears to contain text related to 'Tommy Emmanuel tablature book', suggesting a lure to entice users to click the malicious link. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link confirms a high likelihood of malicious intent.

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=tommy+emmanuel+tablature+book
    • https://static.u
    • https://static.usrfiles.com/ugd/b8c837_a86cc98d60f048a99d863c5b6d6b8d42.pdf
    • https://static.usrfiles.com/ugd/227d0f_a3d73d94479c467094b868280d847bc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f2b7d9a47da44d293e0ccd689a5c3cd.pdf
    • https://static.usrfiles.com/ugd/2813e2_6408f42db372400f9885fdee7bfd949d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f473a4c9cbd24e5c98d85ae586332a7d.pdf
    • https://static.usrfiles.com/ugd/599f1c_aa423b4f11f84dc0a7b9f6a3613b202e.pdf
    • https://static.usrfiles.com/ugd/9dda13_7df7a5a816704c13b7e801d02dc1c310.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2c8bcc33204d9180386fa1e8fab10f.pdf
    • https://cdn.shopify.com/s/files/1/0438/9135/9899/files/bhavani_ashtakam_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/zijimof.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/split_by_page.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/66987056834.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a5b6d53e0354f29a2cb0745f6f9c41c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a96bbc1ccb32487e865e2d35e0d92d77.pdf
    • https://static.usrfiles.com/ugd/5360f8_869cfb7be74d4a46831bb5503e9090b4.pdf
    • https://static.usrfiles.com/ugd/d2751c_a46beb9925294fbc8df10b2c149c3a4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_26397b6645d746d1ac7d26d6c6e962f1.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_off00007e06.bin
c68a26fc1c68bed11ea47144f3804a0a452de8a8cfe16407c7f89002649c3a97
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E06 4908 bytes
font_01_sfnt_off00008ea9.bin
4d1440cfd1363e48fd0e60201085e3ef54542b35a73fd0e80404edb306f2910b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA9 10616 bytes