Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bb1666ea397dda…

MALICIOUS

PDF

52.7 KB Created: 2020-09-29 09:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1e5175a9fdf61ba6da5625d1cc033d7 SHA-1: 78f830f9cccb26508b5e4f7081d53d3e313e6e3c SHA-256: 30bb1666ea397ddaa02c8c93b855ebb22839dfc2057b18d14c10b0c21d633864
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'ggtraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to download further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://ggtraff.ru/mozel?keyword=christmas+carols+ukulele+chords+pdf
    • https://site-1036930.mozfiles.com/files/1036930/13048579019.pdf
    • https://site-1036861.mozfiles.com/files/1036861/jiwanodazu.pdf
    • https://site-1036834.mozfiles.com/files/1036834/56448891176.pdf
    • https://site-1036751.mozfiles.com/files/1036751/35260452293.pdf
    • http://files.affirmationsandinnovations.com/uploads/1/3/1/6/131606874/4859404.pdf
    • http://lamum.catalystmsm.com/uploads/1/3/1/3/131381658/5074305.pdf
    • http://kovobura.sgroiwealth.com/uploads/1/3/1/3/131378950/232377a0cab.pdf
    • http://files.lindaegnatz.com/uploads/1/3/1/3/131379846/papobedapefirexa.pdf
    • http://temov.adeptproduction.net/uploads/1/3/1/0/131071256/ninonebarer.pdf
    • http://files.deefacepaint.com/uploads/1/3/2/7/132741322/muxojako-patur-bagejusadube.pdf
    • http://files.theonlynatalienicole.com/uploads/1/3/2/8/132814232/3406737.pdf
    • https://site-1037106.mozfiles.com/files/1037106/85708652821.pdf
    • https://site-1037113.mozfiles.com/files/1037113/39062574086.pdf
    • https://site-1037233.mozfiles.com/files/1037233/9769581798.pdf
    • https://site-1036681.mozfiles.com/files/1036681/33917499319.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007abf.bin
640a55dfa14aaed15d687d99c8a28bc0dbd61896d78afd18190a25a46512ef66
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABF 5364 bytes
font_01_sfnt_off00008cc8.bin
1d52adbe90a1018024871c829b9329b476f894d6d98071e59584779d9e8b4adf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC8 10140 bytes
font_02_sfnt_off0000af9f.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9F 16312 bytes