Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7365bc84321bce…

MALICIOUS

PDF

39.0 KB Created: 2020-09-20 00:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16b18926fe314099a613bb44d20da64d SHA-1: 058615238d3a8bf700d6c05d6eb378f0f2f2c1f6 SHA-256: 1e7365bc84321bce484b2f988e4816aa7f04fba62e96515517380cdcb4ac0d1c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links pointing to various domains, many of which appear to be part of a link farm designed for SEO manipulation. One prominent URL, https://ttraff.club/wix?keyword=fireboy+and+watergirl+4+tyrone%2527s+unblocked+games, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious or spam content.

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 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.
  • 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/wix?keyword=fireboy+and+watergirl+4+tyrone%2527s+unblocked+games
    • http://files.lazuliliterarygroup.com/uploads/1/3/1/1/131164402/4831477.pdf
    • http://zinokone.maylingkopecky.com/uploads/1/3/1/4/131483067/zowuvazamiku_xogiwo.pdf
    • http://jiker.wickedladiesbeecompany.com/uploads/1/3/1/0/131070602/benon-kekidipi.pdf
    • http://wakutos.robyngraycounseling.com/uploads/1/3/1/3/131398101/8cc70.pdf
    • http://pebugu.stgeorgebadges.com/uploads/1/3/2/3/132303388/622176.pdf
    • http://fajepi.petstylingbysarah.com/uploads/1/3/1/4/131483371/nifitagatadije.pdf
    • http://files.hcl-informix-user.com/uploads/1/3/1/4/131411474/sajidozus_tobawakupe_baxuxe_libidulegij.pdf
    • http://tepibo.ellenlavoiedesign.com/uploads/1/3/1/0/131071073/5492546.pdf
    • http://files.klmlodge.com/uploads/1/3/0/7/130739076/7303396.pdf
    • http://biloten.hermanworks.com/uploads/1/3/0/7/130775903/jawezosagepuk.pdf
    • https://e2b3388b-4bd3-4c3e-85d6-d20e1013c50b.filesusr.com/ugd/32777b_0fd7cfb67e12423fb28432fe0ab394d0.pdf?index=true
    • https://dcb86b7b-a467-4d4b-b773-76197d36f401.filesusr.com/ugd/d5cf39_56f731b4eb5742e99da430824f0ab2a4.pdf?index=true
    • https://54c18b9d-9af4-4326-a928-e9a1e9cf4742.filesusr.com/ugd/6f58fb_2263c1f93d9b4623b5d370d47a543d92.pdf?index=true
    • https://6b0a04d1-b506-4d70-b889-e8cf48f75008.filesusr.com/ugd/cd81e9_012a09dd8dee4d59a6d5a9ffc90478ee.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058e7.bin
9ebda43f2dc861f1889cc7b202ffea02866399cf7e45b8652ce5035eea9281e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E7 5736 bytes
font_01_sfnt_off00006c86.bin
483a541323a244b3585ea80b3867f0ad2c66e6b196791f088bbabddb2fc98ce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 9948 bytes

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