Malicious PDF — malware analysis report

Static analysis result for SHA-256 04796570eef6a825…

MALICIOUS

PDF

76.8 KB Created: 2020-11-19 18:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 082c3d1c74ca21510afcff0c12603cca SHA-1: 10a8e69a85fae9157d5fccfe7176666fb4d8d2c5 SHA-256: 04796570eef6a825048610425f1b6b04a84de4b39ad8cf1bbf8332cede7ecfe2
214 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ggtraff.ru'. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing or malware distribution attempt. The presence of numerous external PDF links, including one to 's3.amazonaws.com', further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=cuantos+centimetros+es+4+yardas
    • https://cdn-cms.f-static.net/uploads/4493195/normal_5faa75c561e6a.pdf
    • https://cdn-cms.f-static.net/uploads/4471514/normal_5fa9d68270316.pdf
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5fa3a82b4144c.pdf
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5fa24d8288ed9.pdf
    • https://cdn-cms.f-static.net/uploads/4426062/normal_5fa91dc41fadb.pdf
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/347993.pdf
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/mijiku.pdf
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/6538986.pdf
    • https://lexikujufuwu.weebly.com/uploads/1/3/4/6/134613894/7063025.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xanofamaja/rgb_numbers_for_aqua.pdf
    • https://uploads.strikinglycdn.com/files/40617550-53d7-4d0f-88b0-1582bdc6b8e6/kabhi_alvida_naa_kehna_full_movie_online.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce37.bin
16a0685b1af8f7ff3286410c82d065b2ef9dd16f5cc5e004aadb0dd239daad33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE37 3120 bytes
font_01_sfnt_off0000d96a.bin
f36e48085e3c590fcfa50d240af817e0e467493f2926a0e337377dbaec8d22fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD96A 5148 bytes
font_02_sfnt_off0000eae0.bin
8eba68e5e5773f6ad0f9c2e9c6972e584de2c3991d01dd34d9d015b764728670		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 10916 bytes
font_03_sfnt_off00010f3f.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3F 16036 bytes

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