Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3991d4a23195d6…

MALICIOUS

PDF

82.8 KB Created: 2020-11-14 04:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec117fcd6b49c6dee5443a414b034de9 SHA-1: b55075e44d2576d486f24d96346aff2f84dcf9ac SHA-256: 7f3991d4a23195d6953d60e3854b13782a4764c00c0d4ac015a1dd4e952f721c
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://traffmen.ru/aws?utm_term=que+es+el+aneurisma+pdf', suggest an attempt to direct users to harmful sites. The presence of numerous external PDF links further indicates a link farm or distribution mechanism, consistent with phishing or malware delivery.

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.
  • 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://traffmen.ru/aws?utm_term=que+es+el+aneurisma+pdf
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f92159d2bc4f.pdf
    • https://fivujage.weebly.com/uploads/1/3/4/3/134316273/kanawaf-pasos-gurol-toleg.pdf
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5f91492f8cbf3.pdf
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/8794426.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dac5af8c-4668-4a6b-b1db-453d69697dae/tuwomov.pdf
    • https://s3.amazonaws.com/jamokaroxoj/41686560224.pdf
    • https://uploads.strikinglycdn.com/files/c462f85e-2bde-457a-81dd-31eee49e8976/toxupinatirasigapegalo.pdf
    • https://s3.amazonaws.com/woberiz/xuvudomeronanuxukesexi.pdf
    • https://s3.amazonaws.com/mutirexa/22662624896.pdf
    • https://uploads.strikinglycdn.com/files/2b8b8279-8202-434a-975f-3f0ba2f35ed2/16968650877.pdf
    • https://s3.amazonaws.com/nafibanefexex/miloreb.pdf
    • https://s3.amazonaws.com/bidivo/birthday_greetings_photoshop_templates.pdf
    • https://s3.amazonaws.com/perurulexi/shooting_star_dream_symbol.pdf
    • https://s3.amazonaws.com/zepifudoxapo/datus.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcda.bin
9fbd4fd8084c5e9b1343115107025f4c4d203311f2349fbff6d3709e5d15b0a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDA 5248 bytes
font_01_sfnt_off00010e9b.bin
d9fb02d901312cade9987b7782dfd4d3e1a429d29775a7f2ef7e32d2b148d801
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9B 15304 bytes