Malicious PDF — malware analysis report

Static analysis result for SHA-256 797ee75a1a7ae48f…

MALICIOUS

PDF

49.3 KB Created: 2020-10-10 18:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 68d4992fc380fb0504df601932d3f6d8 SHA-1: c642fcc8a96603b90ce3124990393e6ac99e8fb7 SHA-256: 797ee75a1a7ae48f1c7b7d1387a49b304e1c9d82c4e086326ff8ecc7feb70bd9
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One URL, 'https://gettraff.ru/strik?keyword=rayas+una+cebra+veloz+pelicula+compl', is identified as a known malicious redirector. The document appears to function as a link farm, likely intended to drive traffic to malicious or phishing sites, potentially leveraging SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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/strik?keyword=rayas+una+cebra+veloz+pelicula+compl In PDF document text
    • http://files.georgiebull.com/uploads/1/3/2/6/132681144/9373783.pdfIn PDF document text
    • http://files.headstart-upshur.org/uploads/1/3/0/8/130814286/00dd2fbfff4212.pdfIn PDF document text
    • http://files.flohlighting.com/uploads/1/3/2/3/132303126/6938598.pdfIn PDF document text
    • http://rutaf.chantal-pollier.com/uploads/1/3/0/7/130739640/totijum.pdfIn PDF document text
    • http://files.vytalmovement.org/uploads/1/3/0/7/130738482/dirimolude-bofebejubulax-rafuk.pdfIn PDF document text
    • http://files.innovationsouthgreenland.com/uploads/1/3/1/4/131407284/zisaw_bemevetev_zebowosevuwaril_nugivaje.pdfIn PDF document text
    • http://modovufa.melissalaureen.com/uploads/1/3/1/6/131606575/9025389.pdfIn PDF document text
    • http://xapuru.mysuidora.com/uploads/1/3/1/4/131437626/nonumodawizerafos.pdfIn PDF document text
    • http://files.dezignerdude.com/uploads/1/3/0/7/130739490/5306921.pdfIn PDF document text
    • http://migezu.pwcyoga.com/uploads/1/3/0/8/130813834/0584f65.pdfIn PDF document text
    • http://gorox.lloydketterlingchristmascarol.org/uploads/1/3/2/6/132681464/5336359.pdfIn PDF document text
    • http://labek.philadelphiaprek.com/uploads/1/3/0/8/130814526/4502070.pdfIn PDF document text
    • http://files.shoptwoowls.com/uploads/1/3/0/7/130739472/juvakavaxuvuj-dalaleziviwivu-fokurorupalupir.pdfIn PDF document text
    • http://vevufe.autumnlealshopp.com/uploads/1/3/1/4/131407995/2514336.pdfIn PDF document text
    • http://files.ncbyouth.org/uploads/1/3/1/3/131380725/58d04.pdfIn PDF document text
    • http://pedab.slr-ofs.org/uploads/1/3/2/6/132695543/xijodowirizaruxokova.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 5436 bytes
SHA-256: 5072e0c68b668753bb0797336bcd94c9699ebce0af80bb2fed893b4b44642fe1
font_01_sfnt_off0000732a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x732A 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00007bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB8 11228 bytes
SHA-256: 2714578a685788f4ae0aa81cad6bc30baf69d85594521acefe122111f4d9f600
font_03_sfnt_off0000a087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA087 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67