Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd3bda1694ae293…

MALICIOUS

PDF

44.5 KB Created: 2020-08-24 01:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0f783195c6d47d61e95e17a51336a99 SHA-1: 058f8869e235d371f9973a240472b1c275fc293d SHA-256: 0bd3bda1694ae29352292fa4f0d50309f6656a6b48776729e0c3ee9c7d86c9c3
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to lead users to harmful content. The ML classifier strongly flagged this PDF as malicious. The embedded link farm and the primary malicious URL suggest a phishing or scam attempt, likely using a lure related to 'training wallet card template word'.

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=training+wallet+card+template+word
    • http://files.waggoner7science.com/uploads/1/3/0/7/130739185/18b5584ef31b.pdf
    • http://files.schoollibraryoutloud.org/uploads/1/3/1/4/131437484/4371810.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/petepokigofenula.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/coriorretinopatia_serosa_central.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/aging_population_and_health_care_issues.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/66321571075.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/jazeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/2846/1206/files/chaucerian_verse_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/internet_explorer_location_default.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/xasibimosi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0430/5285/9543/files/fukegas.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_off000065bd.bin
f63f505aaf9d60458f2f485e2aa1f54609b6fe512959d5be72657c4a48289105
pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 5256 bytes
font_01_sfnt_off0000778e.bin
8d61bbe7ec7443827ec311f6158428831d186dbefb7eb03b6cd50ba54eb6ffb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x778E 13904 bytes