Malicious PDF — malware analysis report

Static analysis result for SHA-256 06883ed2568f7980…

MALICIOUS

PDF

44.5 KB Created: 2020-08-13 12:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b50b6cb47c8540d6e946fe731ec6442 SHA-1: 2d3f5ecdedd4e82c3cbb2bab71b2acfb00045097 SHA-256: 06883ed2568f7980b66ce9ea5bc755ea561f3f4e865b29b9af906725e80e72e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The ML classifier also 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.ru/pify?keyword=renewable+energy+sources+ppt+pdf
    • http://files.writingbynadine.com/uploads/1/3/1/8/131872105/nofokareva.pdf
    • http://natazunaj.jolttherapytool.com/uploads/1/3/0/8/130814328/3714100.pdf
    • http://files.lelynn-ruggles.com/uploads/1/3/0/8/130813692/bb63b0beb1f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/gesokukajipas.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/47096564167.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/20600642251.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/98618168620.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/list_of_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1852/files/8000942269.pdf
    • https://cdn.shopify.com/s/files/1/0431/9100/9442/files/xixow.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/discord_event_ideas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/56617716729.pdf
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/66714414411.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/26015893694.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/printable_blood_pressure_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.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_off00006e61.bin
8840b4d912db41325a8c87493f5ae18b5e76f1d22d42aa91656de8ae5dc48488
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 5664 bytes
font_01_sfnt_off000081c0.bin
b3a654a1538f5105985720141974b9452184ad30ddbaa975903c6890178975d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x81C0 10384 bytes