Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d544f1804f57663…

MALICIOUS

PDF

51.9 KB Created: 2020-07-23 21:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7cf8e757272a427638a1cdfa4537e41 SHA-1: 0cc6c50af072b856a9d3b2a51c60a4c07cc0fa78 SHA-256: 4d544f1804f576638364236a1af2af79365b78884bae77e9f387438f6524b1ca
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document is designed to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic suggests the document is part of a larger SEO manipulation scheme to distribute malicious links. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=nietzsche+beyond+good+and+evil+free+pdf
    • http://files.valleyviewcoc.org/uploads/1/3/2/6/132696029/b9477e5.pdf
    • http://files.milepost0creative.com/uploads/1/3/1/3/131380177/tevebi.pdf
    • http://files.christineheyworth.co.uk/uploads/1/3/2/6/132681779/1067255.pdf
    • http://files.junipercourtseries.com/uploads/1/3/1/4/131437601/dawudovaz.pdf
    • http://files.canoryonlowen.com/uploads/1/3/0/7/130739084/sijalututedonub-lavotegerovem-nejutenoraperu-tunopeket.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6925/files/89788940142.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/bujimotidezodafufuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/dutiwovakuvefav.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/94196779639.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/23072974494.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46605756913.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/guvirinukolijatubunidize.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/71258625762.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/nemexe.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_off000082e8.bin
e79baf208082d7c3c47276575e5be5e87574dd8646a7878e889df077fe44197d
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E8 5528 bytes
font_01_sfnt_off000095b3.bin
4479cd89d43c1ac08f84932989ea9078f2d1ebbe0d2f0a6a621088cbb87ada4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x95B3 14320 bytes