Malicious PDF — malware analysis report

Static analysis result for SHA-256 59cf8c02466d41be…

MALICIOUS

PDF

35.2 KB Created: 2020-10-10 10:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e930969595749f777902c62266ca5479 SHA-1: 6161bdc6a27d6b3bdaf99768af7d03c30fef6fd7 SHA-256: 59cf8c02466d41bed6b6b8bd2c9da5a2871b81a419ed976169759295dee4dfe7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/strik?keyword=dmh+lps+certification'. It also exhibits a PDF link farm heuristic, indicating a large number of external PDF links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and link farm structure suggest an attempt to lure users to malicious sites, potentially as part of a phishing or SEO-based attack.

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://ggtraff.ru/strik?keyword=dmh+lps+certification In PDF document text
    • http://files.cpsaltlakecity.com/uploads/1/3/1/3/131381021/kikisaviputa-salofelelupod-nexexu-lolij.pdfIn PDF document text
    • http://files.all-guard-solutions.com/uploads/1/3/2/6/132681690/gemuzum_koxiponi.pdfIn PDF document text
    • http://tamire.myhillchurch.com/uploads/1/3/2/7/132740763/vopewo-rebal-betuzolov.pdfIn PDF document text
    • http://faloxewo.tarahalltravel.com/uploads/1/3/0/9/130969723/mevedejijosiji_zupazakinadek.pdfIn PDF document text
    • http://files.altodesign.org/uploads/1/3/1/3/131398504/07ecab81.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/1/0485/7446/4160/files/sherman_oaks_property_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6231/2616/files/wendy_nutritional_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6777/9488/files/movawatiliwaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8907/0747/files/st_james_academy_monkton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3751/0817/files/rupofobaxiruv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/58210846583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1758/4285/files/yhm_future_story_telly_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6556/9180/files/xewuvolumiripozasofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/limunedonaviketoka.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_off00004dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DCF 5252 bytes
SHA-256: 6a75de507a454a399ee19987262e82ca7578538bde2979d2284396e36e33187d
font_01_sfnt_off00005f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F86 9460 bytes
SHA-256: b3945dd9e281a3c7b9384f4ff3a90cd0cc33baa224013667bfc0781c5d404a8f

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