Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f426c6d212bd8d…

MALICIOUS

PDF

38.4 KB Created: 2020-08-25 02:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c09adccd8560b45e69120df9c5aafd65 SHA-1: f61a196acf276e08b7d4758b4a6806e47c9a3511 SHA-256: 70f426c6d212bd8d4eff7b03b0ab20c6e09ef72b4fc1d0cadaad2c9ded9c151f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=non+probability+sampling+in+research+pdf, which likely serves as a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

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.cc/pify?keyword=non+probability+sampling+in+research+pdf
    • http://files.blackriverquarries.com/uploads/1/3/1/4/131437017/vireleve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1892/7779/files/27398245201.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/62831129417.pdf
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/juzazoniduwuliwobifape.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/zowebedamutalofunujez.pdf
    • https://cdn.shopify.com/s/files/1/0450/4892/2270/files/43683766793.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/78894818528.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/sample_of_accomplishment_report_format_for_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/biology_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/banagapamadevurim.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/17681189644.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/xatokivupagerufirufifuv.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a4a.bin
99d77948671505a664e7091fbed51007e00e582a6ed541a6682eb78bab2a7ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4A 5780 bytes
font_01_sfnt_off00006dc6.bin
40752f27a635d9c55933e6a43a1f732ef62c21b1e73fb896eefc75d8b9355876
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC6 9204 bytes