Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e2dc80cb138632…

MALICIOUS

PDF

37.5 KB Created: 2020-11-02 02:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9513539da5fc1d34ed75df41f17de4bb SHA-1: 1f02e53a5dbc1aadba95fc77cf7546919b2aca47 SHA-256: d4e2dc80cb1386328645510d5aefb3859337d6a0cf213dae25ea9341ce8a7ed9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting a lure to download potentially malicious content. The ML classifier strongly supports the malicious verdict.

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/123?keyword=governor+of+poker+2+modded+apk In PDF document text
    • https://kakoxisowi.weebly.com/uploads/1/3/4/3/134358665/xetewususepo.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/goredomonolitef_voruxugi.pdfIn PDF document text
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/dukonivadopuduv-tifipitot-lonijodalofelig.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://sesorefamasupuv.weebly.com/uploads/1/3/1/0/131071262/9179173.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/1/0502/1735/3400/files/valores_normales_de_los_electrolitos_sericos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8694/7500/files/ahsan_ul_fatawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3403/3307/files/52732758214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/20319067824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8947/0643/files/international_journal_of_cultural_studies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0515/5227/files/nilodedakufugevejus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5208/8477/files/gixunimodirujukujuten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9950/3805/files/25590582828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4082/3203/files/measuring_up_reading_level_f_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/8338/7842/files/46816008577.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_off00005372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5372 5264 bytes
SHA-256: 555301d4c160a28bc31e93680ef77dab4f006c939d91ca0a2a50afccad0d1e05
font_01_sfnt_off00006557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6557 10680 bytes
SHA-256: 4ff1cbbff05f664d2127b2784ab2ae59c9c8876acdd0326008bc537dc154935e

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