Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0f134ff5416f48…

MALICIOUS

PDF

45.0 KB Created: 2020-08-08 05:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53dc44b29f4789efd2871bacf7f134a3 SHA-1: 72d96a80a04450f262dec738b3dce7c7d5095e27 SHA-256: 7c0f134ff5416f48a6c6c5188abee5b7ca890770c6575a9e9ccbbf60fad8ff55
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to `https://ttraff.ru/pify?keyword=karnataka+state+budget+2020+19+pdf+in+english`. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=karnataka+state+budget+2020+19+pdf+in+english
    • http://files.tillersmath.com/uploads/1/3/0/9/130969695/tunadusuz.pdf
    • http://files.doncavarchi.com/uploads/1/3/1/4/131437380/6450612.pdf
    • http://files.aphroditesislet.com/uploads/1/3/0/9/130969077/588683.pdf
    • http://files.mountbarkerstrathcatholic.com/uploads/1/3/0/8/130814397/lajebejuwegamu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67257536452.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/powezeleriripeze.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2948/files/43940889544.pdf
    • https://cdn.shopify.com/s/files/1/0440/7328/7830/files/bukosuxelanavopedi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/babidopelelatoruvapori.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8688/files/astrotheology_for_life.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/6656840563.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/57511196461.pdf
    • https://cdn.shopify.com/s/files/1/0428/5880/7455/files/41299344685.pdf
    • https://cdn.shopify.com/s/files/1/0429/1015/4908/files/monubawolebojeno.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/86425860862.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/casio_fx-_115es_manual.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_off00006635.bin
0e41e738aae52e3015c490e7e8b4f89fe470b7f9a62e5590a74425a5bbe52672
pdf-font-stream PDF embedded font (sfnt) at offset 0x6635 5956 bytes
font_01_sfnt_off00007a79.bin
d324a3600bcdfb4f665259f28fa99c4b78c022dff14f6b0f7cdae0a4b55d9d96
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 14276 bytes