Malicious PDF — malware analysis report

Static analysis result for SHA-256 0897e9592eb90b6c…

MALICIOUS

PDF

37.7 KB Created: 2020-08-02 18:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95ba14cd7056df229bad39a6dbf9af4a SHA-1: 8e23eac567e8fd6bf9aa2de4899443a682fbafc5 SHA-256: 0897e9592eb90b6cad47c717ef0a27c82f1b7c2d8240d1678c7d8a20d105c54f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a mass external link farm, with one prominent link directing to 'https://ttraff.cc/pify?keyword=cookie+clicker+2'. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The document body itself is heavily obfuscated and contains the malicious URL.

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=cookie+clicker+2
    • http://files.jblaw.ca/uploads/1/3/1/4/131437669/8a888b6012bbd.pdf
    • http://togufa.kimberlyjamesphotography.com/uploads/1/3/1/3/131383775/situluzobitew-nusarelavutup-vobeba-kunakof.pdf
    • http://files.harborimpactministries.com/uploads/1/3/1/3/131380619/jewopupudusiregokud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/lelezelaruxawijuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/79485595191.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobuwavidojanunixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/gisiwof.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/supazoginiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/35780327498.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/kamaposemulegup.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/calculus_larson.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/22303779896.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7625/files/dikadalefevaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/bizavufujisodufovez.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_off0000593c.bin
3b9977b615ca3776ab50c648e342df37e1a4bb0d2e90a55898045f3554f5f517
pdf-font-stream PDF embedded font (sfnt) at offset 0x593C 4508 bytes
font_01_sfnt_off0000689d.bin
75b9ac68ac9366b5ad10635da78fdd3642d5646b103a2a36442b5e1c5704df6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x689D 9892 bytes