Malicious PDF — malware analysis report

Static analysis result for SHA-256 817ac6ee908a0c1b…

MALICIOUS

PDF

44.4 KB Created: 2020-10-08 11:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 33eac2de5f3866fd94e52f2a79d1a7f3 SHA-1: 6ff5dcb9de8db4908c2424675ca10ffa0bcc6f9c SHA-256: 817ac6ee908a0c1b6cc536327c0c6e9978bb50c4aef2312521e0dded035ba487
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially obfuscated, contains the primary redirect URL, suggesting a phishing or redirection attempt to a malicious site.

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 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.club/pify?keyword=the+general%2527s+daughter+may+14+2019+dailymotion In PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/guler.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/lilowu.pdfIn PDF document text
    • https://site-1038334.mozfiles.com/files/1038334/wadonuk.pdfIn PDF document text
    • https://site-1040177.mozfiles.com/files/1040177/mizodim.pdfIn PDF document text
    • https://site-1037894.mozfiles.com/files/1037894/ziziro.pdfIn PDF document text
    • https://site-1040180.mozfiles.com/files/1040180/23545747063.pdfIn PDF document text
    • https://site-1040574.mozfiles.com/files/1040574/99226960156.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/80522824-be41-4e9e-bbe3-87dd1a3535b5/nagukivitip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482195a8-8c12-4edc-b3ea-b6c80518bd8b/nuluworidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52808f95-4d55-406e-9199-3896e5029a9e/fadesegerabeweduluvowafes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b221bf2f-c4e3-4307-931e-98a9053bc406/rurejiwarexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae87be0-0cee-4cca-810f-a02252742a92/78807562751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328e88e7-eb1c-422b-b7ac-5a4181b4ef53/tasasokawozeratututefet.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_off00006cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB7 5892 bytes
SHA-256: 58d7fdb8aa42ff14eccd24f9682e1c0175a531c6e2d2298d3d5b4bb5bc72318d
font_01_sfnt_off000080ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AC 10560 bytes
SHA-256: a1fb1afde9a67a8786c65cb930da01430ab6cfec82c77d779fb3eea4ce56c403

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