Malicious PDF — malware analysis report

Static analysis result for SHA-256 06733cb2ac15b3dd…

MALICIOUS

PDF

50.2 KB Created: 2020-08-20 05:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c8d9e8c8c52fd2709153e12f44a7880 SHA-1: 6123cdd3ff7fb64ac901dc8ce94a03992e8c984c SHA-256: 06733cb2ac15b3ddd6dd0648aef79738a43e416cfb8f10eae5cf3935dd4e69ba
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a redirector URL, identified as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a phishing or scam attempt. The presence of numerous external links, many pointing to benign Shopify URLs, indicates a link farm strategy to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=employee+appraisal+report+template
    • http://files.stpatsni.co.uk/uploads/1/3/0/8/130814208/pobimupuronebox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/foluxuworufoginedasipo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7351/files/fokavipupazusidegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/contending_with_christianity_s_critics.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/38740095990.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/benim_hocam_tarih_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/nafapuziwefumax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.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_off000088c1.bin
1a654cddd788410ac48e3b793070708522cc851af15a25f80505dfe44ebe2976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C1 5024 bytes
font_01_sfnt_off000099c5.bin
7f7d672dc8a6c65f403144aeb763b08d66faa921918443dbb3b2c60d16c3ffb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C5 10244 bytes

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