Malicious PDF — malware analysis report

Static analysis result for SHA-256 267957c321e82b7d…

MALICIOUS

PDF

34.4 KB Created: 2020-10-10 18:36:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a8dde9a1a2706577f45a31d016815ea SHA-1: 4ea5843bac4e70aa219393f092e3f827c5ef3867 SHA-256: 267957c321e82b7d7de0c84d85460d1551ef2e19f8b37f08a94cc3054fb400d3
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL. The primary intent appears to be redirecting the user to the URL 'https://cctraff.ru/strik?keyword=marilyn+manson+killing+strangers+download' which is likely a phishing or malware distribution lure. Several other PDF URLs were also extracted, some of which are also suspicious.

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=marilyn+manson+killing+strangers+download
    • http://jojenuv.thewanderingweb.com/uploads/1/3/0/7/130775169/rijumanumazeg_nalipoli.pdf
    • http://files.callihanenglish.com/uploads/1/3/1/3/131398564/b27fe54449.pdf
    • http://files.madesimplydev.com/uploads/1/3/1/4/131437680/58e95.pdf
    • http://zobeg.estellebrown.shop/uploads/1/3/1/3/131398285/zonixe-xetinavu-bapilonumu.pdf
    • https://site-1037251.mozfiles.com/files/1037251/59344978203.pdf
    • https://site-1036679.mozfiles.com/files/1036679/badiwiwafisox.pdf
    • https://site-1040981.mozfiles.com/files/1040981/21669846573.pdf
    • http://konemi.bakedbounties.com/uploads/1/3/1/8/131871767/b76f67720.pdf
    • http://files.janshoemaker.com/uploads/1/3/2/6/132681021/pezobuditod.pdf
    • https://uploads.strikinglycdn.com/files/25a246aa-9bb1-49a5-bae8-bd67727418eb/71711535577.pdf
    • https://uploads.strikinglycdn.com/files/bf47c6c0-82a3-4bf8-aeb3-233c2736586f/lebozilosanovovajomemowe.pdf
    • https://uploads.strikinglycdn.com/files/fd53a64d-7404-4896-9186-eb6fcd946e52/mizupejovimuwilawejuseb.pdf
    • https://uploads.strikinglycdn.com/files/842c19b6-ae3a-49b9-854a-e20048e5a1c0/danek.pdf
    • https://uploads.strikinglycdn.com/files/0c6cdb95-e727-4e6b-ae23-e420f4421788/gagusedipami.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004612.bin
4948e5d4183a689b77de65d1fb645d02119e9c343804f2b91397d97e89a7d9d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4612 5408 bytes
font_01_sfnt_off0000587d.bin
051362c2db68b0322d4bcede26a4dd05bea38b51764609d9db6dbc701f9f8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x587D 10576 bytes