Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea436e134acc0d4…

MALICIOUS

PDF

49.5 KB Created: 2020-08-25 08:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00cc955db7b41ad6bfb28120c3b2c4fd SHA-1: f0548f3569aa42d4c402b274840e7f99a9fca68f SHA-256: 7ea436e134acc0d43d5a9e77a1940a0320f9154f319e34868f21e1014dd90fb7
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'minecraft pc gratis versi terbaru 2018'. The document also hosts a large number of external PDF links, many of which point to potentially malicious infrastructure. The ML classifier 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.cc/pify?keyword=minecraft+pc+gratis+versi+terbaru+2018
    • http://files.rh-rentals.com/uploads/1/3/1/4/131406800/9496159.pdf
    • http://zifon.iobcwa.org/uploads/1/3/0/9/130969950/7152418.pdf
    • http://files.kwik-fix.co.uk/uploads/1/3/1/6/131637889/8397394.pdf
    • http://files.mikefraserphotography.co.uk/uploads/1/3/0/9/130970003/7243392.pdf
    • http://files.drjustingallantnd.com/uploads/1/3/0/7/130738644/ritegirul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/renewable_and_nonrenewable_energy_sources.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2616/files/pradhan_mantri_awas_yojana_guidelines_rural_areas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/birab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/6431239206.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/certificacion_leed_requisitos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9424/files/rofuzutovilekivo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6914/4230/files/maranatha_worship_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/4084/7510/files/boat_and_stream_questions_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/tikodofusume.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/vugodudisebizow.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/59102714769.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_off00007ef8.bin
f78294109a99a0318ed861edc18c16c02f7f5d421e7c617b0c3311c46a6f408a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF8 5876 bytes
font_01_sfnt_off00009315.bin
7b290f54453f1c45ed8486c5cb471b99fbb7b0ccd4c93360b74e918afb2c2be7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9315 10976 bytes