Malicious PDF — malware analysis report

Static analysis result for SHA-256 564629ac175778f7…

MALICIOUS

PDF

50.0 KB Created: 2020-10-02 16:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f3b587f499601ca878b417be549f1615 SHA-1: ddf239ef98a8082b3ec55ea05ff30c41344e294c SHA-256: 564629ac175778f7c4c4f88ece950397f7e0b31a2e02f030b75bd382375a9f67
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 of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary purpose is to redirect users to potentially harmful content.

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://cctraff.ru/strik?keyword=technology+in+action+14th+edition In PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/63262294287.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/zuzem.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/97759404738.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/vovakumejuvevogojolava.pdfIn PDF document text
    • http://files.chidonhatanakh.com/uploads/1/3/0/8/130874493/samijeten.pdfIn PDF document text
    • http://files.drewhoover.com/uploads/1/3/1/4/131453823/funapodo-disizawakox-fojovurove.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/1/0482/9141/4171/files/rowdy_rathore_full_movie_in_hindi_2012_akshay_kumar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9379/8298/files/265_70r16_tires_ebay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5390/6080/files/tukusajosofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7239/3894/files/59492492129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0385/3476/files/jevupudojaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/81464848412.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_off000084a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A6 5116 bytes
SHA-256: 6eedf423223228ed6ecc50ce251629105e00976bc7b41a15db58b1765f3f960c
font_01_sfnt_off0000961d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x961D 10872 bytes
SHA-256: 671a81e271e5f82c49fa28ca0227e8c6854db3e156712c4b348c8a65080a758f

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