Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3131a68a62c08a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 01:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3f8b8d1c5f13aef63de855bd84e60f4 SHA-1: f5863f30f12ac841dcf410f9232b08f8b600a03e SHA-256: 6b3131a68a62c08adfb26b51ac0b486740c8964d868bdbbe7039d35049b0f2f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to external PDFs, a technique often used for SEO link farms. One prominent link, 'https://ttraff.com/pify?keyword=the+apocryphon+of+jannes+and+jambres+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=the+apocryphon+of+jannes+and+jambres+pdf
    • http://files.kingrobinsonibmagnetschool.org/uploads/1/3/0/8/130874063/letumiraxarizusu.pdf
    • http://files.peterandmichele.com/uploads/1/3/1/4/131408942/fudad.pdf
    • http://files.lincolnherring.com/uploads/1/3/1/3/131379706/2738395.pdf
    • http://files.thecornishgiftco.com/uploads/1/3/0/8/130874246/zujavolox.pdf
    • http://files.ccmooresville.com/uploads/1/3/1/3/131381819/tanupip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/18046748192.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/15848743217.pdf
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/mebuziteg.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/international_business_strategy_articles.pdf
    • https://cdn.shopify.com/s/files/1/0432/5294/0968/files/seroxowikiva.pdf
    • https://cdn.shopify.com/s/files/1/0430/8130/2167/files/xekuziw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/8001953336.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0438/8379/0491/files/94_buick_century.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/watch_borat_online.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_off00005c70.bin
bc91c958a3da18328f00044fd5aba8aed393d6442057ff93af8d3726bceccc93
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C70 5632 bytes
font_01_sfnt_off00006f73.bin
5cd27d0a7009339656b4926d692ad08766c4c4bb094b1f408cc7aa7c0d6f31a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 12480 bytes