Malicious PDF — malware analysis report

Static analysis result for SHA-256 8175d25d42e1ec47…

MALICIOUS

PDF

42.9 KB Created: 2020-10-02 16:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7bd0d5124541e8ee268c18de7db2a4a9 SHA-1: 2c1eef74b2882f000201f91be0318bf49db4e1cf SHA-256: 8175d25d42e1ec475bdd948b994307bb5c1a4d0771db94ef91d7fb23078b810c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The embedded URL https://gettraff.ru/strik?keyword=simbologia+electrica+norma+americana is likely intended to redirect the user to a malicious site. The PDF also contains a PDF_SEO_LINK_FARM heuristic, suggesting it's part of a larger scheme to generate traffic. The ML classifier 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://gettraff.ru/strik?keyword=simbologia+electrica+norma+americana In PDF document text
    • http://files.raglandwrites.com/uploads/1/3/1/3/131398419/638ac8.pdfIn PDF document text
    • http://files.princessmi.com/uploads/1/3/0/8/130874102/2238965.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3119/5559/files/titan_souls_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8233/3864/files/backstage_season_3_cancelled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/48285931420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/5567/9132/files/xanathars_guide_to_everything_classes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/tiger_muskie_utah_teeth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3467/2294/files/evidence_of_evolution_worksheet_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/ferrous_juniper_sapling_extra_utilities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/zerapugeforekodepafeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7434/2050/files/society_for_the_metaphysics_of_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8499949e-c731-442f-acf0-2ab06ce9461d/dobokaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963988dd-5d29-4fc7-882e-26c229c38d31/vebagedod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f92012-4f94-4f49-93c9-9251e24b9284/58860530373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ba3134-2164-4168-9e8e-86a69c5938cd/11052079722.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5977 5184 bytes
SHA-256: d71fb2928e4d417f78bfcb2aefccbec5aa20fba6de947a321283a227e9068037
font_01_sfnt_off00006b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 15972 bytes
SHA-256: 0dc310b0d72675b85a65bf01a9541a36d2566d181614213842d24cbd8512d0dc

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