Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1dc39594ac9b6e…

MALICIOUS

PDF

47.3 KB Created: 2020-10-07 10:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 86787c3db4cb12b3da611bc09d29d05a SHA-1: 59a557a5b6194618237752c72851ad66e800e3fc SHA-256: 8c1dc39594ac9b6e316b88acb2dedbff1d895b09ee49d87b9e2460a681ad29f2
124 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though obfuscated, contains the URL 'https://gettraff.ru/pify?keyword=ron+white+net+worth+forbes', suggesting a lure to a phishing or scam page. The ML classifier strongly supports the malicious verdict.

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://gettraff.ru/pify?keyword=ron+white+net+worth+forbes In PDF document text
    • https://site-1037870.mozfiles.com/files/1037870/61709462009.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/95041754990.pdfIn PDF document text
    • https://site-1041169.mozfiles.com/files/1041169/64539891963.pdfIn PDF document text
    • https://site-1037894.mozfiles.com/files/1037894/87937217661.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/8088270984.pdfIn PDF document text
    • http://pakosog.theblossomtree.org/uploads/1/3/0/8/130873982/ac63c28e5c0ab.pdfIn PDF document text
    • http://files.carabrinkmans.com/uploads/1/3/1/6/131637074/pufoj.pdfIn PDF document text
    • http://jevadagik.electricrailwayclubsflorida.com/uploads/1/3/1/3/131384536/gubisixamexup-kudike.pdfIn PDF document text
    • http://wututubu.afiniadentalportal.com/uploads/1/3/2/8/132814930/posasad.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/11929902560.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/soteme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0b9a4925-d140-45f9-836f-296f6f44ead5/41702080095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f70d7c6-f1bc-4244-aeb6-497a904d5efa/ridawek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E57 4640 bytes
SHA-256: a3a5091b6253559f7abb84cd65887890cd4705e479cbd58a23d1537b22341449
font_01_sfnt_off00007e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1B 10668 bytes
SHA-256: 089defe3573875d63ad328d343ee6897ed8436b0ac02d26f5773fabd85ea51a2
font_02_sfnt_off0000a281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA281 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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