Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e587bf7b88be9e…

MALICIOUS

PDF

36.6 KB Created: 2020-09-22 16:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b8b977934e18285c1aeaa2fd409bf0 SHA-1: 23e1be4dc6b9c1d4fc347ae39c41adb712ec211f SHA-256: 84e587bf7b88be9ec94e75193f71e13bc74e4251c97f79275ae49155777c6730
184 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL 'https://ttraff.link/wix?keyword=people+playground+unblocked'. The document's structure and embedded links suggest a phishing or scam attempt, leveraging a seemingly innocuous topic to entice clicks. No scripts were extracted, but the PDF's malicious redirector link is a strong indicator of 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/wix?keyword=people+playground+unblocked
    • http://files.imssb.com/uploads/1/3/1/3/131380480/196340.pdf
    • http://wetojene.sproutandgrow.org/uploads/1/3/0/8/130814576/gofevoju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/98085038567.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3453/files/wordly_wise_book_6_lesson_12.pdf
    • https://cdn.shopify.com/s/files/1/0462/2942/2229/files/baby_driver_video_songs.pdf
    • https://b7312659-5fc7-4914-8ef3-1c253ff57913.filesusr.com/ugd/5b9a87_91bb5cf3230243f2b24a49e8a42d7dad.pdf?index=true
    • https://348e0cc2-a6ff-4ea7-9e29-c4695c286609.filesusr.com/ugd/65d6f7_cb39f4f05fb4492e8e5e58d7585ffc63.pdf?index=true
    • https://174169df-cdca-49c5-b625-231591c217a6.filesusr.com/ugd/76dd3d_4a41555f674a42618afcd11700ff5d61.pdf?index=true
    • https://ebebd4d3-2206-4fab-b3ac-a77e96f3596f.filesusr.com/ugd/144d27_42a8411770134a979f1ed7a3500cd09e.pdf?index=true
    • https://ce15ba6f-7a1b-4b57-a47b-851429fbd764.filesusr.com/ugd/18122d_30d8567c9ca0439da02f1fc2a5fca053.pdf?index=true
    • https://a4299084-7659-4be9-94db-7ee6404f90b2.filesusr.com/ugd/d17951_e837b20d39ea4662890078946ec5d574.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005082.bin
4e71632f38a96745c853eb059c122e6b80fc267ac0ade2955c6c6bee378130bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5082 5372 bytes
font_01_sfnt_off000062dc.bin
c989cab824e87ddf6cfa3eb87958b6a9544b3ae91b31d173df659d24ff4fc64a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DC 10312 bytes

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