Malicious PDF — malware analysis report

Static analysis result for SHA-256 60424930a2570be9…

MALICIOUS

PDF

49.9 KB Created: 2020-08-17 05:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d521aaa16bd4d478e1ecca466fd2a268 SHA-1: 73383e10e37e3424a0cc237c843d1a4dbf088527 SHA-256: 60424930a2570be962f83f9cc01da13b785741057c42636fa0a47e4c1e60a57a
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lure users to a potentially harmful site. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a phishing or credential harvesting attempt, likely initiated via a spearphishing attachment.

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.com/pify?keyword=news+world+report+law+school+rankings
    • http://nebejoba.bhgmedia.com/uploads/1/3/0/7/130776099/649263.pdf
    • http://files.joescornerniles.com/uploads/1/3/1/3/131383651/4730a60544d.pdf
    • http://verodap.tuscarorawildlandfirecrew.org/uploads/1/3/1/3/131384284/478ab1e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/tixizonetizurujaxitoxobep.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/95637367773.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/pilufokav.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/silokizim.pdf
    • https://cdn.shopify.com/s/files/1/0447/4057/5381/files/agricultural_economics_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/48031429002.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/73158836681.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/65344164269.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/15421125602.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/sakekupuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/28723949325.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_off0000771d.bin
2786355aa882a3efc9bd13da0b4996a089fb6bc92afeeb283d570a0b3e8dad3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x771D 5460 bytes
font_01_sfnt_off000089bb.bin
9eedaa1708bf73afccd1a4e3c0d785689279dd47616c6ffe40653ed26c2a9fe1
pdf-font-stream PDF embedded font (sfnt) at offset 0x89BB 15864 bytes