Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e114257ec7e0d21…

MALICIOUS

PDF

72.0 KB Created: 2020-10-29 23:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3f4411506d1bd0bd7f4fe2fc976d3715 SHA-1: d80c0ca9c29596de65bf0f0c7839ff132d8278e0 SHA-256: 5e114257ec7e0d218ed0a78eea2cff24e75468a9bbcb9672411f86593d612ea9
124 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL and appears to be a lure related to a book title. The ML classifier also strongly indicated maliciousness.

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.ru/123?keyword=ronald+dworkin+justice+for+hedgehogs+pdf In PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/zenoxuxor_wifaro_lumidaxi.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/59852.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/0e3407.pdfIn PDF document text
    • https://pusojavinobaz.weebly.com/uploads/1/3/4/3/134353251/fudixis_puzabaxiwalexu_zegijorojuni_sidulixeboxo.pdfIn PDF document text
    • https://meporolokiso.weebly.com/uploads/1/3/2/6/132681401/1153013.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/8795789.pdfIn PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/fovifoxobet.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://s3.amazonaws.com/zuxadol/biocombustibles_definicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65c6867-2a7b-4a5d-bdd7-b1427b3b4a75/armitron_watch_set_time_wr330ft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0caf15-0c45-4054-ad87-5e25b1f816cf/pirodiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42cf6b9f-c1ff-43f5-95a7-3634e8db598b/jotovumel.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/fallout_3_light_step_worth_it.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/aristotle_nicomachean_ethics_book_8.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_off0000cfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB5 5540 bytes
SHA-256: 442a95a9f9ae793e20b67dc0a48102f07a6f97dd20f1490d123ddc0a7a673e7b
font_01_sfnt_off0000e29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29A 9980 bytes
SHA-256: 796a6fb65bf09ed0c3faf11b4c1c16b20fd79693ce5283b74841dc7b9d8811c3
font_02_sfnt_off000104bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BD 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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