Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2ceaf38d1bc8b7…

MALICIOUS

PDF

45.0 KB Created: 2020-08-10 11:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06fca9d0d8fe84291225a52ab7ff6b65 SHA-1: 2388b1d63bd783a2644427c5a11f17e44037d141 SHA-256: 6b2ceaf38d1bc8b7fddf84f462da1398607e808edadbc531b62772c79f6df488
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, suggesting a link farm or SEO poisoning attempt. The embedded URL 'https://ttraff.cc/pify?keyword=calendrier+vacances+scolaires+2020+et+2020+pdf' is identified as a known malicious redirector. The presence of a 'download button' lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=calendrier+vacances+scolaires+2020+et+2020+pdf
    • http://files.captivatingcriminalitynetwork.net/uploads/1/3/1/4/131453024/4576163.pdf
    • http://files.foto4funphotography.com/uploads/1/3/1/8/131871633/1623876.pdf
    • http://ruwinina.witnwords.com/uploads/1/3/2/3/132302782/paxisuvakigazobet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/43414562592.pdf
    • https://cdn.shopify.com/s/files/1/0439/4768/8091/files/algorithm_maths.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/gutekigenevisemumigasuji.pdf
    • https://cdn.shopify.com/s/files/1/0435/2399/7856/files/68250777221.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/6265316051.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2843/files/statistical_process_control_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/53938766326.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7566/files/61754573638.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/40247506924.pdf
    • https://cdn.shopify.com/s/files/1/0434/3001/9229/files/6971210682.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_off00006e59.bin
21b1646904446065b6051890fc419c5989206a405c376a49380e3d4c9092213a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E59 5388 bytes
font_01_sfnt_off000080be.bin
79e8fdd046cc50cf9f506adbc0ced954345536eef6c47f680b44748056ed6980
pdf-font-stream PDF embedded font (sfnt) at offset 0x80BE 12008 bytes