Malicious PDF — malware analysis report

Static analysis result for SHA-256 5980d1ac8f67eb31…

MALICIOUS

PDF

46.6 KB Created: 2020-08-18 16:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5911d6d07fd4e09fd9841a172da1a6e SHA-1: 1529d1a09204df0d303e6cba2ede34657726c696 SHA-256: 5980d1ac8f67eb31773473102690601866c708fe41da71eae98b07a9df641387
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Ebay. co. uk app' and a URL that appears to be part of a link farm designed for SEO manipulation. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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.com/pify?keyword=ebay.+co.+uk+app
    • http://jodupizo.verticalmilerally.com/uploads/1/3/2/3/132303079/nagafabugawimoropoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/83272685902.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/deferred_tax_provision_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/sejatuj.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/the_iliad_book_18.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/boutonniere_deformity_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0447/7786/5367/files/bangladesh_bank_exam_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0451/1150/9145/files/add_text_to_adobe_reader_x.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/antioxidant_vitamins.pdf
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/pokesimevajazudusog.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/marital_adjustment_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9000/files/21648626948.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000792b.bin
2687459ac691ace277b35813618936e3bfb949f38bd77e1cf1e14eae7a1df7dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x792B 4916 bytes
font_01_sfnt_off00008a09.bin
8bf46c1dfb46973a1cb44f5e03874673ce163e06dda12966e10a718ea80efcfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A09 10540 bytes