Malicious PDF — malware analysis report

Static analysis result for SHA-256 7597f03fc0cb09c6…

MALICIOUS

PDF

42.3 KB Created: 2020-08-15 05:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05090ebc4889b6081e5a54969c982da0 SHA-1: 0dbf8f39e243270be588600822dd4b169972be25 SHA-256: 7597f03fc0cb09c640836bd02be768d1ce0cb5b9b4c5107dd6e998ecb6b54d0a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to `https://ttraff.com/pify?keyword=whistleblowing+in+zimbabwe+pdf`, which is flagged as malicious. The document body, though heavily obfuscated, contains this malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=whistleblowing+in+zimbabwe+pdf
    • http://tokitolej.imadocshighsign.com/uploads/1/3/1/8/131856602/70b7e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/characteristics_strengths_weaknesses_and_kinds_of_quantitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/bopexapebagekiluwozujivu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/pamagomuxafavalokobo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2134/2619/files/31343692320.pdf
    • https://cdn.shopify.com/s/files/1/0437/5383/2609/files/medicamentos_antipireticos_lista.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/adobe_air_apps_for_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0675/files/19743710446.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/17169629229.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/57535341951.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7007/files/lbs_to_kg_chart.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_off00006715.bin
130d871da45262ec1b0868c25252f53bc5331596581c6789360d1db667363b23
pdf-font-stream PDF embedded font (sfnt) at offset 0x6715 5656 bytes
font_01_sfnt_off00007a3b.bin
88c58f934c07d6385b3d801ee101d7931bab3648f2bb24e8858ff41428ed55d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3B 10008 bytes