Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3a268bf3ec19c9…

MALICIOUS

PDF

51.4 KB Created: 2020-08-31 04:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa8f87b104117f48aecb797247a6a6ff SHA-1: b31143a4ec11334ddbeebe5025cf9d621049d393 SHA-256: 7d3a268bf3ec19c939bd137c99e74f8f4eac88a5dbaca75d79c7c7279e59cd06
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is ttraff.com, which is likely used for phishing or malware distribution. The document body contains obfuscated text and a URL that mirrors the malicious redirector, suggesting an attempt to lure the user to a harmful site.

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=gisela+campos+psiquiatra+infantil
    • https://cdn.shopify.com/s/files/1/0437/2407/9254/files/guided_tour_eiffel_tower_paris.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6735074847.pdf
    • https://cdn.shopify.com/s/files/1/0439/8268/4318/files/bomber_friends_mod_apk_offline.pdf
    • https://cdn.shopify.com/s/files/1/0436/5792/0677/files/da_form_137_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/7745/8334/files/atmospheric_refraction_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/estratgia_empresarial_livro.pdf
    • https://cdn.shopify.com/s/files/1/0434/3608/1308/files/measurement_conversion_worksheets_grade_5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a87d4cc30eb49c3b2bcdcdcc9fcc668.pdf
    • https://static.usrfiles.com/ugd/10b11f_6a635875375d4661998857523f792d61.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/90157034200.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/nexus_mod_manager_wrong_username_or_password.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0199/files/mimarivubukonexegirofuli.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089b1.bin
cca5bd8a9daf6e099692c4e47c758f2144747c507d80eac374600a66b4f6a311
pdf-font-stream PDF embedded font (sfnt) at offset 0x89B1 5316 bytes
font_01_sfnt_off00009bb6.bin
7e434fa568c15b797f619bff82f97fde27a7214bd76305464721d564aadee6f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB6 10760 bytes