Malicious PDF — malware analysis report

Static analysis result for SHA-256 b115b74b50db0143…

MALICIOUS

PDF

35.6 KB Created: 2020-10-03 02:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 952f90ba6797683b4ffd1bf49396abb7 SHA-1: 74328cc61779e61caf7997d021fd9bec23b4a8ae SHA-256: b115b74b50db0143b2e39192a78cde68de653c9dd75b6c22cbe40b68aa0095b7
184 Risk Score

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://ttraff.me/pify?keyword=wwe+2k16+android+apk In PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/derimositexurarudexegodir.pdfIn PDF document text
    • https://site-1037868.mozfiles.com/files/1037868/lutex.pdfIn PDF document text
    • https://site-1038707.mozfiles.com/files/1038707/645710983.pdfIn PDF document text
    • https://site-1039226.mozfiles.com/files/1039226/nimikuwugose.pdfIn PDF document text
    • http://files.asliagirbas.com/uploads/1/3/2/6/132682048/2288946.pdfIn PDF document text
    • http://files.genified.com/uploads/1/3/1/6/131636914/776d5a152594c.pdfIn PDF document text
    • http://files.lydlinch.org/uploads/1/3/2/6/132696351/dc44cd8b3.pdfIn PDF document text
    • http://files.xr103.com/uploads/1/3/1/8/131871698/3356286.pdfIn PDF document text
    • http://files.refreshglobalnfp.org/uploads/1/3/1/4/131407351/1a93d7a.pdfIn PDF document text
    • http://files.gaiabamman.com/uploads/1/3/0/7/130776200/zexavuvefugakov.pdfIn PDF document text
    • http://files.fitnessdefuego.com/uploads/1/3/1/3/131380985/vefafo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/ark_download_survivor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/2020_tundra_manual_transmission.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/1211/2803/files/mivobonetaxe.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB0 5248 bytes
SHA-256: 3dabed9911ced90e7a8bed980b5a86caaf423188aae08f2515399326b0087f84
font_01_sfnt_off00005fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBC 9952 bytes
SHA-256: 6e48e17a2cc57c972131d69b0f5ec53f45712f7b6f84b6ae1ea0e1f3732be9b8