Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18b4e80da7d6abd…

MALICIOUS

PDF

68.5 KB Created: 2020-12-21 01:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eb61804cb216d4a38ed87efa57305d6 SHA-1: acca4a442fad94896d775948923eb206eaa890cc SHA-256: c18b4e80da7d6abd1fa34143b24c15af6b08ffe2086a8973792e385da0a651d8
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and are likely part of a link farm designed to redirect users to malicious sites. The primary malicious URL identified is traffmen.ru, which is flagged as a known malicious redirector. The document's content, though obfuscated, appears to be a lure for printable chore charts, aiming to disguise its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/strik?utm_term=kids+chore+chart+printable
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/6201518.pdf
    • https://xigukiburid.weebly.com/uploads/1/3/2/7/132741693/biperagoze.pdf
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/repuxenirowireman.pdf
    • https://gebaxugore.weebly.com/uploads/1/3/4/5/134594027/c1ae1.pdf
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/2911471.pdf
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/naseruwuwebobezasek.pdf
    • https://fulutikirulile.weebly.com/uploads/1/3/4/4/134471812/pedig.pdf
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/16c1d87bcac4.pdf
    • https://woxexawunum.weebly.com/uploads/1/3/0/7/130776255/rukesopavesadu.pdf
    • https://nakakikixug.weebly.com/uploads/1/3/4/4/134490848/3783364.pdf
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/7059004.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gedesisumi/7596065427.pdf
    • https://static1.squarespace.com/static/5fde97c9d0ff57695e6cefc3/t/5fdf4eab7514fb3b76567610/1608470192184/dusumafodosataluv.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_off0000c616.bin
9b00dc647083838c78cda2d0a7c1f1686f4ffad9a072c2f282b01454ce68252f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC616 5056 bytes
font_01_sfnt_off0000d72c.bin
3e549b42367f8e3b0ac0eb8acee17f173a96c78e56799685aeeb464f21ead059		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 9456 bytes
font_02_sfnt_off0000f775.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF775 4324 bytes

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