Malicious PDF — malware analysis report

Static analysis result for SHA-256 717a58e97a734275…

MALICIOUS

PDF

33.3 KB Created: 2020-11-01 16:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 3d637743e822c4d9f59ed728819fdf7c SHA-1: 7b92e860735bbf1f59d9f8be47dd33aa30cd1a04 SHA-256: 717a58e97a7342750faa9bc98b4016cc5dfccecd61c03ab5ded093770064c586
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, forming a link farm. One of these links, 'https://ttraff.me/pify?keyword=hyper+tough+cordless+rotary+tool+manual', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious nature.

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.me/pify?keyword=hyper+tough+cordless+rotary+tool+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_5f9709c9f0c2d.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/gewedun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393022/normal_5f93388f26a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_5f8d1a3716857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f89b76d1f76c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_5f9b3fb672bf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5f8ccb8e6c100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f8c4bc451b78.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/1/0436/5330/0377/files/stunting_and_wasting.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_off00003fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FD3 5548 bytes
SHA-256: 8f0ff139cd73ceb39244d9e53900e6da8f4c370b95fbd76fd012a69bbd507726
font_01_sfnt_off00005294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5294 11240 bytes
SHA-256: 4033b54264eeb02501f4796e4726c081350f4340a966737989be270ad77230ef

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