Malicious PDF — malware analysis report

Static analysis result for SHA-256 f685b306801daf91…

MALICIOUS

PDF

81.0 KB Created: 2020-10-30 08:10:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f784725824b24cee606dbef1c3825598 SHA-1: 1bfc77460353c68f25e40e6e63f9b8e58c5ee626 SHA-256: f685b306801daf91673cc82c65e3ff02795f9639af5c948672d789cf2b01e0cb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?keyword=logitech+z-2300+equivalent'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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.
  • 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/123?keyword=logitech+z-2300+equivalent
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdf
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/sepixivisedijapafe.pdf
    • https://cdn-cms.f-static.net/uploads/4403807/normal_5f94cf38512c6.pdf
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/razakasi_diluvopipow_fesosa_lumawigenemu.pdf
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/e96a3fa2bef86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e0df837d-ce47-41b7-af3b-2fdcecce471b/luella_high_school.pdf
    • https://uploads.strikinglycdn.com/files/aa890213-a3ab-451e-a8ec-6c269c769c93/1219878099.pdf
    • https://s3.amazonaws.com/zetare/hemoglobin_estimation_methods.pdf
    • https://s3.amazonaws.com/zurovajij/science_reading_comprehension_passages_middle_school.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5a.bin
dbc45dc7bc25b05e754507fab54dbb72a3da306e8cb968dcda1072ecdc580efa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 5436 bytes
font_01_sfnt_off0000fcff.bin
e794d956df62a742fbaa6f5d6f80ffd5927c70187d1d19075f588cd9b6d9ff2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFF 10852 bytes
font_02_sfnt_off0001222d.bin
2df60db25c4006ebf5ce7f30ca7461b7931ff48239c1caafece913cf4cb3b6f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1222D 16136 bytes

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