Malicious PDF — malware analysis report

Static analysis result for SHA-256 7040157f3b447c3a…

MALICIOUS

PDF

39.0 KB Created: 2020-09-21 21:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b12cbec10744a80a00a57ee3e0e625de SHA-1: bf08aa009a7a0970d66ba0febb9eb6334949126d SHA-256: 7040157f3b447c3a138be6c4e5989020dcff7ae99b115035d0533c9e0ae6a23e
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, with one specifically identified as pointing to known malicious redirector infrastructure. The document body contains obfuscated text and multiple URLs, suggesting an attempt to lure users to external sites. While no scripts were directly extracted, the structure and heuristics indicate a likely phishing or malware distribution attempt.

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/wix?keyword=anh+nguyen+md
    • http://files.mx.tourofguam.com/uploads/1/3/0/8/130874125/xulefadug_koruvogisene.pdf
    • http://wavug.centraldrivewaysstratford.co.uk/uploads/1/3/0/9/130969260/toxido_baragolakobalu_vateve.pdf
    • http://zapefemal.aide4paws.com/uploads/1/3/0/9/130969627/supivol.pdf
    • http://xoraf.courtneyscorner89.com/uploads/1/3/1/8/131856713/9852797.pdf
    • http://guluf.loisfaber.com/uploads/1/3/2/3/132302842/9412562.pdf
    • http://files.citynorasprings.com/uploads/1/3/1/0/131070112/9604318.pdf
    • http://files.thailandbusinessbrokers.net/uploads/1/3/0/8/130874205/bilowifudixumi_golupufeluxokek.pdf
    • http://files.plumbcogroup.com/uploads/1/3/2/6/132681812/rolikesupog-sepasufedabuna.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4fa40a14-ba75-472e-9019-ab401041667f.filesusr.com/ugd/197ed4_e96dbe8a9ef34c51b806bad41c8972b7.pdf?index=true
    • https://f09bc12d-f945-4e7c-a406-60448cd0858a.filesusr.com/ugd/23a6c3_09e93b2481ae45c8a4d546960cffd80c.pdf?index=true
    • https://7c0aa0a0-97fd-4787-b70a-ec92e23dee31.filesusr.com/ugd/9c43ec_94b8a56f4902485da37f2706574437b4.pdf?index=true
    • https://7266b4eb-65f4-4260-b113-a180da46e1aa.filesusr.com/ugd/5899d5_ae314d9bbdb5400590195a8d71090753.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/gokekuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/cdf_vs_vs_pmf.pdf
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/49510946094.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_off000058dd.bin
796f913c45c75cb8896be4b116440459d3ee30fed4ea99a0dfcd7466ac625413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58DD 4812 bytes
font_01_sfnt_off00006922.bin
36030e864fce7a184da3dcd4ad1723c57d2be3f5895e469fc9beb77ca8bf3010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6922 11272 bytes

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