Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbe083297726006…

MALICIOUS

PDF

50.1 KB Created: 2020-07-28 16:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46768420d60db06b3b3a52ec569746dd SHA-1: 9dc38f337a7fa26f5e36738b6e506566fec21135 SHA-256: 5bbe083297726006590224500c63a5ecd4547b5be8af8e2309762ef8954337aa
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document's structure and embedded link suggest a phishing or scam attempt, likely delivered as an attachment. While no scripts were explicitly extracted, the PDF format can embed JavaScript, and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a high likelihood of malicious intent.

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.ru/pify?keyword=computer+science+internship+resume+template
    • http://files.idontdrink.net/uploads/1/3/0/8/130815277/kijuna_loluribaz_keduvatul_lapopas.pdf
    • http://files.suffolkshelties.com/uploads/1/3/0/8/130874338/vajivivebililegav.pdf
    • http://files.rosieduttonphotography.com/uploads/1/3/0/8/130874403/5b366f.pdf
    • http://files.freesellerclasses.com/uploads/1/3/1/4/131483249/7bbf3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/92557099302.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/92905016125.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/gadixekiwidisaxis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/weperujibepilezojidatoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/kugafejulanemaverojufafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3835/1255/files/47012496132.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/97088862363.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/xakagivenonoraw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/kewowatavemivoguk.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_off000086eb.bin
01f4dd87d7928750a3f7950d107d9ea357006ffe30d35462f79856353de6678a
pdf-font-stream PDF embedded font (sfnt) at offset 0x86EB 5076 bytes
font_01_sfnt_off000097f9.bin
2dce8694d272579cc57d47355c5c6c3b15eacb44c16b9767e4a466f3389a87a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x97F9 10340 bytes