Malicious PDF — malware analysis report

Static analysis result for SHA-256 704a1f1c41f92469…

MALICIOUS

PDF

41.9 KB Created: 2020-10-08 17:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7e191eee1c9b57b2f0a5bedbe4066d9a SHA-1: 3b474580590cfee5281a9fa0e0d9c08cf337ab3a SHA-256: 704a1f1c41f9246987bf67f323f348bb1b391fa2c286e44b3ec7033d8ca41cff
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on suspicious domains, indicating a link farm or redirection scheme. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/pify?keyword=the+wheel+shop+math+problem+answers In PDF document text
    • http://wilatito.bookofhebrio.com/uploads/1/3/1/6/131607062/448891.pdfIn PDF document text
    • http://lagetemu.binksgames.com/uploads/1/3/1/3/131383544/letebekamanugab_kofafaxo_ninipekub_sawadopofi.pdfIn PDF document text
    • http://files.jackmccuemd.com/uploads/1/3/0/9/130969507/piwafigijiwo.pdfIn PDF document text
    • http://memiv.mitchellhabitat.org/uploads/1/3/0/9/130969481/lujidafoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c4720a-b1d6-470b-94d4-efd89926b935/30942699452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccece45a-b87a-40a3-bb21-a510589e8c1e/57237805893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/684030f7-97e5-4d15-934d-0588e32c962b/39474475708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085fcb50-c53a-4522-a30c-8a0e498a9085/25061392437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b136efbe-2b56-47a4-81ce-85588d4aeea5/rosupijujunaluzigutefure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a97a9d8-0d2e-45ae-936c-b678e413d4f9/magopoduwurilivuzenuxed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad37ef7-4c8e-491d-8802-bf56a170a80a/9935205548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e55984c-465c-4ed2-8443-085988d32f3d/pemapesad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03dbb6fc-a0f0-4b29-aa1f-9fdc340d6a3a/gatizewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28881ec2-ab2e-4a9c-a7fe-5ad34e61f7aa/99693569384.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_off00006709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6709 5240 bytes
SHA-256: e59874f6232a724ea7c669638eb7572c3d622ef47e170557ef09e1cbbc465aad
font_01_sfnt_off000078ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BA 9952 bytes
SHA-256: 44c4f852cc883815cc1af887ff8ebfece028783b26a77f1c36a7a0b0b146bbc7

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