Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80b162a07bdb17e…

MALICIOUS

PDF

44.2 KB Created: 2020-10-08 03:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4c5dee56d4eed7887f643791008ceef1 SHA-1: ba3df315986db6ab79937f9f91b1aafd97bdd9ec SHA-256: c80b162a07bdb17e608b1f13e1839b6c6f7813c2e3dcee63af24774f49987b2f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirectors and disposable hosting, indicating a link farm or SEO manipulation tactic. The primary link directs to 'ttraff.link', a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.link/pify?keyword=golf+with+friends+hole+in+one+guide+volcano In PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/siwobofotulaligimal.pdfIn PDF document text
    • https://site-1039261.mozfiles.com/files/1039261/21747826080.pdfIn PDF document text
    • https://site-1037856.mozfiles.com/files/1037856/15873648838.pdfIn PDF document text
    • http://files.artofmichaelnguillen.com/uploads/1/3/0/7/130738759/8175764.pdfIn PDF document text
    • http://files.oregonioof.org/uploads/1/3/0/7/130776035/186143.pdfIn PDF document text
    • http://wezupaje.vnannj.org/uploads/1/3/0/8/130814623/6601267.pdfIn PDF document text
    • http://files.endoyoga.com/uploads/1/3/1/8/131871643/mubafof.pdfIn PDF document text
    • http://files.individualee.com/uploads/1/3/0/7/130776246/linejofamifatowizu.pdfIn PDF document text
    • http://files.greendrakeoutdoors.com/uploads/1/3/0/8/130813409/ratowalakovunu-nosudaj-sipad-sebazepuna.pdfIn PDF document text
    • http://files.sanmukyuu.com/uploads/1/3/0/7/130775674/6451369.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/b67f9066-84d0-4733-b997-7a02dde45f60/8393198198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c151c037-247c-46c2-ac35-980e447d0fe8/xejenorisos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f274345-a1ca-46ca-aac5-83b286f3f0e0/nuletowivozok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c84cf3a-c56f-42ac-9d75-8e98f40ea489/datizuxonelatixet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c095df-f57c-469e-ab45-b52192a2f313/55529501366.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_off00006de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE4 5464 bytes
SHA-256: a4773b9c75c19c01586b1fa8e55ab80f697eaed00cee56ad2f6375a07a9e1e70
font_01_sfnt_off00008095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 10276 bytes
SHA-256: 31b80f7771e2f712f84f2d90004deec0c8dfe5f8d00d5c656217b3a959aea993

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