Malicious PDF — malware analysis report

Static analysis result for SHA-256 0236f63b94d10a79…

MALICIOUS

PDF

36.8 KB Created: 2020-08-16 19:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be50438c6e3903d2362ece541fe9679c SHA-1: e0a2e153d43c3b3cb189ceab6607c4137f45813f SHA-256: 0236f63b94d10a79268acbe3062b025e519e056e567fe1331ada9d0751d4bb19
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that likely serve as lures to download further malicious content or redirect to phishing sites.

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.ru/pify?keyword=nathaniel+bassey+book+of+life+music
    • http://files.glambymaame.com/uploads/1/3/0/9/130968984/7008946.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/pesetimokomidik.pdf
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/wujudelepakebamudi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1040/7069/files/kugofopozuwiwegavux.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/wemipotosazozudekipegosa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/niraza.pdf
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/fagejizunalexikosifumimo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/20508724673.pdf
    • https://cdn.shopify.com/s/files/1/0432/0110/1985/files/cours_energie_non_renouvelable.pdf
    • https://cdn.shopify.com/s/files/1/0429/5625/9491/files/pijapaturenaxuv.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_off00005425.bin
fbc9205a42ebfbdd4901da2fb70fd3c63073b65bf8375044d9333821fafa43ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x5425 5300 bytes
font_01_sfnt_off00006612.bin
d28e2ac6159fa4881e11416c854ebc8302f9354890dfa99295be89724596f395
pdf-font-stream PDF embedded font (sfnt) at offset 0x6612 9564 bytes