Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f4be7460c5e8c2…

MALICIOUS

PDF

34.4 KB Created: 2020-08-18 17:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a2d53a87ca285730b83f9f7bf71a802 SHA-1: df131cdac06c411024a47cce7d3bf7cd878fb32c SHA-256: 01f4be7460c5e8c2e9afe9f76e5aa0bf137f544b161ceefb7905ab030bbf49c5
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, pointing to `https://ttraff.ru/pify?keyword=force+and+motion+worksheets+for+5th+grade`. This URL is embedded within the document body, suggesting a phishing or scam attempt disguised as educational content. The presence of numerous other links, many pointing to Shopify, indicates a link farm strategy, likely to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=force+and+motion+worksheets+for+5th+grade
    • http://xefexider.heaveninspain.com/uploads/1/3/1/3/131398140/segaw-pidenudusokuruf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7817/3351/files/lithonia_2blt4_cut_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/jomarigigexiriwixikoxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/84920242258.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7152/files/ashby_3rd_edition_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/24130185975.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wemulaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/introduction_to_analysis_wade.pdf
    • https://cdn.shopify.com/s/files/1/0434/2307/2412/files/19515479905.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/vuravujosaxodajo.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_off000046b0.bin
e77313f73b636fb761a0517adaa79f14979c956ea8ea2d2470dbd8f65f0c8cc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x46B0 5640 bytes
font_01_sfnt_off000059cb.bin
71cd93ba1db0da3158e814a147a381b9b63284d411b89910555111dab84b3d5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x59CB 10248 bytes