Malicious PDF — malware analysis report

Static analysis result for SHA-256 701a27f0596f4845…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 23:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3acbd880c617343b1c118a9e37d1f7 SHA-1: 1df674db150516d6835d227f167f3cce06d01730 SHA-256: 701a27f0596f484590caa098fc23e892498a04100b64a1cedcdf3dfdd4982473
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a power outage report. The embedded URLs suggest an attempt to distribute further malicious content or phishing pages. The ML classifier strongly indicates 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=hawaiian+electric+power+outage+report
    • http://files.moversinmiami.net/uploads/1/3/1/4/131484133/tadovef.pdf
    • http://files.mrchunsclass.com/uploads/1/3/1/3/131398367/joludime_baboxuwugodad_xutewisu_vujad.pdf
    • http://runakus.workshopsas.com/uploads/1/3/0/7/130776260/xaragumudekali-duworejogugu-xulutosuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/11070754154.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93336639176.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/62048919694.pdf
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/45707334301.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/zigakarafurumidinatesu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4196/2646/files/tezewagisutudibuga.pdf
    • https://cdn.shopify.com/s/files/1/0435/3694/1215/files/domidemetugirosexopasaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/call_center_script.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/rovutulatojilor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/73737395223.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_off000063ed.bin
243988fa91b136542ab21deab7f3fdb79a46b9587c12cf3874c288ce8e998eef
pdf-font-stream PDF embedded font (sfnt) at offset 0x63ED 4976 bytes
font_01_sfnt_off000074f0.bin
13f7cf715a76f11bea58ad44c46f6d6272416d453b2071d2b0277e74a7d0d7a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F0 10076 bytes