Malicious PDF — malware analysis report

Static analysis result for SHA-256 d255510f2a35ecf5…

MALICIOUS

PDF

63.5 KB Created: 2020-08-29 23:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df20bd542066739b9621bba2c1d4fb9b SHA-1: 2a8064cb7bc744c3d919b6a5dd89a0f951b3b01b SHA-256: d255510f2a35ecf59aaccf4e43907088ecf3479b63db3c4867422bcd417ad01b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=iso+7498+2'. Additionally, the PDF is flagged as a link farm, suggesting it's part of a larger infrastructure to distribute malicious content. The ML classifier also strongly indicates maliciousness. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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.ru/wix?keyword=iso+7498+2
    • https://static.usrfiles.com/ugd/b8c837_32e17859efe84569b320a1a9966ec6cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3c5f7b5177842d1a8af5e3d7de42d29.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5e70e157be746149adf42f7af666429.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c20278505c14891a2e7a81577fb5f91.pdf
    • https://static.usrfiles.com/ugd/0d002d_11ef076f486640689ecc633cdbeb55d4.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/tabubedopolutukojif.pdf
    • https://cdn.shopify.com/s/files/1/0436/9353/9482/files/android_studio_get_coverage_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/zotujovewugaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/xowalozitanawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1088/2727/files/rinutoderawinax.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/difipikafobononur.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/17625586421.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/rafael_amaya_tem_filhos.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/bread_box_plans.pdf
    • https://cdn.shopify.com/s/files/1/0432/1162/0509/files/roll20_character_sheet_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/wiminiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/warm_bodies_tamil_dubbed_movie_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/69412284956.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/49950775514.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd81.bin
2a72929c7ad8763f3626d148a4dd88a42573f8e2285b3e20d10db916ab897f80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD81 4928 bytes
font_01_sfnt_off0000ce5d.bin
6a848f3a92c232a03222de6f5e37a54c7852ae97998f6ccb6e8e5d8f5df92ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5D 10148 bytes

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