Malicious PDF — malware analysis report

Static analysis result for SHA-256 680563214795e458…

MALICIOUS

PDF

49.1 KB Created: 2020-09-19 00:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 311532f6cfc0696cca9b128e910c20df SHA-1: 22fca1ec1ded33a77d8c59a7d62ba4cbff7c136c SHA-256: 680563214795e4586ebbcc804765c46b2b373cccb45b24ee6be5fd0158e0907f
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it's a redirector link. The document body, though heavily obfuscated, contains a URL pointing to a redirector that uses keywords like 'duel links mod apk gems', suggesting a lure for potentially unwanted software or phishing. The PDF also functions as a link farm, hosting numerous other PDF documents, likely to obscure the malicious redirector.

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=duel+links+mod+apk+gems
    • http://madiniber.mysunshinedistributors.com/uploads/1/3/1/8/131872295/1471353.pdf
    • http://files.kenmare-bayview-house.com/uploads/1/3/1/4/131406736/2731539.pdf
    • http://dojupufud.yogawithved.com/uploads/1/3/0/7/130739978/6545babcac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9545/7946/files/difference_between_carburizing_and_nitriding.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/nogituwil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/gupukep.pdf
    • https://cdn.shopify.com/s/files/1/0433/8276/7779/files/xigoxow.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/fumamebufosavugizif.pdf
    • https://ac9f946c-aaec-4ef7-b306-9ff5374a0160.filesusr.com/ugd/8a5fcf_6577c5b8787248ff8ad0e7449a0fa1c5.pdf?index=true
    • https://2c6a3aee-c25a-458d-b4f4-87e2dde9f2d5.filesusr.com/ugd/041b56_008ff858df3541a9a9102577ea98e06c.pdf?index=true
    • https://5960bc72-ead0-4312-b2de-66fcedcd8989.filesusr.com/ugd/8a9bcc_6e6242aafa864ced82aa0ff929aa837e.pdf?index=true
    • https://41c54f74-638c-4695-8343-8a13f8d00888.filesusr.com/ugd/e5412a_2f7f448266e2438592c01faf12fac646.pdf?index=true
    • https://248e3bf4-d373-451e-ae1b-63e72c517214.filesusr.com/ugd/269bb8_90a54914c4834e23b73af72445897947.pdf?index=true
    • https://9c4ce18a-bd2d-47f2-9ceb-210ba5f10b1e.filesusr.com/ugd/485053_aa3018f80f2841e29f093bdc36fe7e22.pdf?index=true
    • https://05032521-7b12-472f-b5e4-8c20b360b1cd.filesusr.com/ugd/49f5ef_77f5cbfdeeba422ab6901e2da225573e.pdf?index=true
    • https://d6c6a3a6-a2c1-4884-897f-b04135f32833.filesusr.com/ugd/696117_ea26cb03bfda43bea7fd4b912d7e8ce6.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fb5.bin
5338ca6f1518d69bf657a8feebe7cdea612910c999c1b7bf0294fba92cc198d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB5 5048 bytes
font_01_sfnt_off000070cd.bin
b54302263c4a6f72780553ef30369022b237fbfefa005df5de3009ff5678b0bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CD 10320 bytes
font_02_sfnt_off00009411.bin
ab862ddcc36e5f8abbcc0ec12f45ee2a0a0017beba85073a80867d3ee452b16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9411 16160 bytes
font_03_sfnt_off0000a917.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA917 4324 bytes

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