Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5286ac51c64588a…

MALICIOUS

PDF

80.3 KB Created: 2020-12-30 03:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 142a4426a7e56367a562af98d69ecd6b SHA-1: 791fcfa824bc6194de8ae912d67b0ce8bf114ffa SHA-256: b5286ac51c64588aa7e3639046b05f54d0163d39dd4c69aeb91c2f1bb62f0829
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, including critical alerts for linking to known malicious redirectors and acting as a link farm. The embedded URLs, such as 'https://gettraff.ru/123?utm_term=proctor+silex+slow+cooker+manual', are likely used to direct users to phishing or malware-hosting sites. The document's structure and numerous external links suggest an attempt to manipulate search engine results or distribute traffic to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • 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/123?utm_term=proctor+silex+slow+cooker+manual
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5fa6d58e38d3a.pdf
    • https://cdn.sqhk.co/vapezuwe/djiYdie/2052154188.pdf
    • https://desemezek.weebly.com/uploads/1/3/4/4/134458593/zofevunubadedos.pdf
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/2564413af4d29.pdf
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fe38b6c1e045.pdf
    • https://wabumixa.weebly.com/uploads/1/3/4/5/134585451/3ee189a5.pdf
    • https://tevutilig.weebly.com/uploads/1/3/4/5/134585367/8559205.pdf
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/zugefowonavu.pdf
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/xuwunat.pdf
    • https://domenotupeloli.weebly.com/uploads/1/3/4/6/134685365/a1b8ff62b866.pdf
    • https://cdn.sqhk.co/jagakutojut/bici4VK/real_dunk_basketball_games.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/penefelomiju/customer_service_week_2019_magic_squares_answers.pdf
    • https://uploads.strikinglycdn.com/files/7bd81c0b-89b0-4abb-a463-efe937d9613a/50478694275.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e51a.bin
72b815926571ed76dcdb15ba0f925f8be737f518649be50e3ea36e0fc125b231		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 2940 bytes
font_01_sfnt_off0000efa6.bin
6bf53f6f8a6493c91755d403984cd785f151e104059f2bd30827f585437c69f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 5052 bytes
font_02_sfnt_off000100c6.bin
854fa7808cbf9c151dfa6daf1eb4940f0feb5ae8a2560ba310093851ec65c338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 10768 bytes
font_03_sfnt_off00012589.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12589 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.