Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6c2d7473835fff…

MALICIOUS

PDF

45.7 KB Created: 2020-10-04 20:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0f204f1ef3b7df647f2489eacb20fec SHA-1: 5f5dd365d51520fb9ad04207cdbdf79e0ce5e002 SHA-256: 9c6c2d7473835fffd437f7579827fd7fff314cc22c8f92daa7da84d925eba66c
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to a URL that is likely part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the PDF's purpose is to trick the user into visiting this site. No scripts were extracted, but the presence of a malicious URL strongly indicates a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/strik?keyword=the+greatest+showman+piano+sheet+music+book
    • https://site-1039201.mozfiles.com/files/1039201/52992730290.pdf
    • https://site-1039577.mozfiles.com/files/1039577/57713303452.pdf
    • https://site-1036805.mozfiles.com/files/1036805/88370633839.pdf
    • https://site-1041411.mozfiles.com/files/1041411/refatelobewogegiwopos.pdf
    • https://site-1039294.mozfiles.com/files/1039294/bikawawowobufidifuko.pdf
    • https://site-1037122.mozfiles.com/files/1037122/sesebivosudabimovusudeki.pdf
    • https://site-1042448.mozfiles.com/files/1042448/55122001283.pdf
    • https://site-1041937.mozfiles.com/files/1041937/48315304370.pdf
    • https://site-1040200.mozfiles.com/files/1040200/tizija.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e41d8145-371e-4806-ace8-1f8ddaa0ac2f/sakiruzifeze.pdf
    • https://uploads.strikinglycdn.com/files/07f0ecc6-8328-4bfa-b439-20f6ef328ba0/vuxifu.pdf
    • https://uploads.strikinglycdn.com/files/e680dc50-ffb5-4ea0-8b3c-2e4838ac6ddd/79227406202.pdf
    • https://uploads.strikinglycdn.com/files/5673a7d5-1e47-4596-8160-3c6baef33e17/75395343114.pdf
    • https://uploads.strikinglycdn.com/files/4951de3e-f024-4c33-b4e4-e80a580305ed/ladalusoxasijewapinakuzer.pdf
    • https://uploads.strikinglycdn.com/files/387e4222-87da-4732-97e5-dd987300e881/xasetixatawamew.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_off00006578.bin
ca68058e678b568729ae9c2c58645d8955fae216012b7298ade468031136a30f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 5444 bytes
font_01_sfnt_off000077eb.bin
6adbd20f795ce39545f18c0833ed011f2e94a5718a6ed53ae6ac858e5dc23bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x77EB 10316 bytes
font_02_sfnt_off00009b21.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B21 4324 bytes