Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a4fb9df2d8c3bf…

MALICIOUS

PDF

68.5 KB Created: 2020-12-02 17:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f635feea8d55a2e1f1b6770b35ee1d3 SHA-1: 581def81cbb435ac027080f9813e4b349dd6d901 SHA-256: e6a4fb9df2d8c3bf886f82e0ead9f3a7a695b64354cf95f136db86ac057f3abb
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is `https://ggtraff.ru/aws?utm_term=driving+skills+test+study+guide+ohio`, which is flagged as a known malicious redirector. The document's structure and the presence of many external PDF links suggest an attempt to distribute traffic across multiple sites, likely for phishing or malware distribution.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=driving+skills+test+study+guide+ohio
    • https://cdn-cms.f-static.net/uploads/4486374/normal_5fbe8ab3c960b.pdf
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/9651355.pdf
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8712cbd8e95.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tadevewuju/best_antivirus_android_2018.pdf
    • https://uploads.strikinglycdn.com/files/4a09f5ae-4aca-486a-be18-4bdd8ab8d375/girusunuxowefij.pdf
    • https://s3.amazonaws.com/loneminovu/gmx_free_sign_up.pdf
    • https://static1.squarespace.com/static/5fc0f2f6c89e1c4b8fbea157/t/5fc1bc4a4f98375720208a54/1606532170831/samsung_galaxy_s5_user_manual_at_t_mobile.pdf
    • https://s3.amazonaws.com/zugutixe/48142525134.pdf
    • https://uploads.strikinglycdn.com/files/363a5d16-cb22-4ea6-91f6-51d08ef660f5/swtor_kira_gift_guide.pdf
    • https://s3.amazonaws.com/midaguvimabof/58006260363.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c552.bin
0abc249d019b63a9879a506cab51e5197f63990a05a2dd2be14fcadd20214a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC552 5100 bytes
font_01_sfnt_off0000d6ba.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BA 3720 bytes
font_02_sfnt_off0000e21d.bin
6e1226375d7221fb408d5cd4ad31eba752df4d79bac01c2faf8dc22099f03531		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 10236 bytes

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