Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f14e4cbbd796657…

MALICIOUS

PDF

82.0 KB Created: 2021-01-14 06:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bffd1f3577b340cd1de7ce5be9615bff SHA-1: 7a082e3ecde1d2c7bc97ad3b96a549b460695cbd SHA-256: 9f14e4cbbd7966572f68efb994c8006bcfe92b8e9b46d4aa2f4c3c60d04f1582
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded URLs, such as 'https://gettraff.ru/aws?utm_term=viva+la+vida+violin+1+sheet+music', indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/aws?utm_term=viva+la+vida+violin+1+sheet+music
    • https://site-1176370.mozfiles.com/files/1176370/gamer_wallpaper_iphone_x.pdf
    • https://cdn-cms.f-static.net/uploads/4381090/normal_5f9523ea81c3d.pdf
    • https://cdn.sqhk.co/libegavezu/Hb4jjAV/better_camera_mods_1._15_2.pdf
    • https://site-1178979.mozfiles.com/files/1178979/meteor_shower_april_2020_animal_crossing.pdf
    • https://site-1214349.mozfiles.com/files/1214349/wynk_pro_mod_apk.pdf
    • https://site-1177364.mozfiles.com/files/1177364/14616623355.pdf
    • https://site-1180242.mozfiles.com/files/1180242/20663870902.pdf
    • https://cdn.sqhk.co/numanazolov/RDE2kU6/red_spiky_slug_pokemon.pdf
    • https://site-1203862.mozfiles.com/files/1203862/39555926941.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/diwitapezu/goxaribipizur.pdf
    • https://s3.amazonaws.com/fojaxexino/flip_a_clip_app_store.pdf
    • https://s3.amazonaws.com/juduk/potivipudepuko.pdf
    • https://s3.amazonaws.com/befarekogol/moresogemilokul.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6a.bin
e8dc4509d57ceac7e652251792651b4fa688fd313751da10e6eca06a3eeb160e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6A 10788 bytes
font_01_sfnt_off000101c7.bin
40405b94305c9b6ccdced433c731051e5b926f9b1b9a588548a7d1f0c85d90f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 5160 bytes
font_02_sfnt_off0001133c.bin
163813eba84d7463d8c07b5f30c7d51ff173cdfa2156e0ab207e0dea11cd5d79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 11528 bytes

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