Malicious PDF — malware analysis report

Static analysis result for SHA-256 044d33f51dcb923d…

MALICIOUS

PDF

69.3 KB Created: 2020-11-23 22:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5ac8b0b4cdc88b82688961ed7283813 SHA-1: 787a0f4cfdae3832a8d2c0bf03cc8668537c63d1 SHA-256: 044d33f51dcb923dd17a183750bad562012baf207892db7251c1b6d0bc385330
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to benign-looking documents, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs, 'https://trafffi.ru/123?utm_term=connect+ps4+controller+to+pcsx2', is suspicious and likely leads to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URIs further supports a malicious intent, likely to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=connect+ps4+controller+to+pcsx2
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/8905909.pdf
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5fa1965ab8eae.pdf
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5f8dc45825c5e.pdf
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5f9a49c1d2ccb.pdf
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/tusiwisotoloko_dizofipa_nuxer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tevigotu/cat_diesel_engine_manual.pdf
    • https://s3.amazonaws.com/nuxepiduded/wusojanekapedazuba.pdf
    • https://s3.amazonaws.com/lunojol/ophthalmic_instruments.pdf
    • https://s3.amazonaws.com/zukukelejurotef/california_red_sided_garter_snake_uk.pdf
    • https://s3.amazonaws.com/tonisefoteka/flight_booking_form_html_code.pdf
    • https://s3.amazonaws.com/xokebore/infection_control_cms_worksheet_file.pdf
    • https://s3.amazonaws.com/wonoti/9856360475.pdf
    • 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_off0000d153.bin
7d93422f8bfc82e25e9f9db03cb5b91b999bb07e2fb87dcb760375be72bb6d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 4908 bytes
font_01_sfnt_off0000e223.bin
846fbd41ec478fe6d7e4675a724e1b125b7fa3f24cf723fcc591fd25d0eba338		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE223 11540 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.