Malicious PDF — malware analysis report

Static analysis result for SHA-256 8996896607a673a0…

MALICIOUS

PDF

39.9 KB Created: 2020-09-05 23:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 23ca987cfcadd464f6edc27c890f3ac8 SHA-1: 1acc834be6e9354108b3bf9e37991e3bbfde3e50 SHA-256: 8996896607a673a0cc72cfa4a78fce97785a93f7a2d282d684848936fb6cb4af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.link/pify?keyword=beringer+luminus+chardonnay+tech+sheet In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/82706295468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/lezitigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/93784395812.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cece23_9012a8fbf8544745b00d618e83d08628.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d48fe3_7290aa31e00a4e71a4beee895550b9d6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6c98bc_be7bf6a729964037b93c4c7697a48f0e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/mac_keyboard_shortcuts_symbols.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/nuwetopedudibawub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C6 5384 bytes
SHA-256: 871bea2e92b08e9c46a8cca33a0ec5f5af34ae87406707612e2817b07dffcfde
font_01_sfnt_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 10012 bytes
SHA-256: 4e79a0429e33e2ca7cfd4f19f04cbec9aab50fea2c8a845061943014b79ec688
font_02_sfnt_off00008506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8506 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f