Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c01b6bacf4c0f8b…

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 21:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef7df0b5592c16072c1dc55658c08fff SHA-1: e211fb166c76bc8cfed2a3666d98c6455d772777 SHA-256: 9c01b6bacf4c0f8bb177c25e7ec24724978e15c6716d32f1c1a7b7b7c13554ee
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though partially obfuscated, contains text related to software downloads and includes the malicious URL. This suggests the PDF is designed to trick users into clicking the link, likely leading to a phishing page or malware download. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.cc/pify?keyword=abbyy+eformfiller+mac
    • http://files.bate-field.com/uploads/1/3/0/7/130776110/4344355.pdf
    • http://jodopo.alysonhunterartist.net/uploads/1/3/1/4/131437792/2900656.pdf
    • http://files.swisspastryonline.com/uploads/1/3/0/7/130739227/6455861.pdf
    • http://files.buildingleadersforsuccess.com/uploads/1/3/1/4/131437778/88f9d.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/botany_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4959/files/45754903529.pdf
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/zegesugorojadazimowifeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/batasijuvesusuzirilukej.pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/southpaw_full_movie_hd_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/6522/7929/files/5493166337.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/best_air_fryer_review_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0439/1324/8923/files/340065268.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/jufomawopurojenolebizutil.pdf
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/a_guide_to_drawing_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/banogibumagomala.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ed.bin
8c1e587c0ac5688fed4c54f0ebe7b542bae707e62350aefe1cecce900efd9c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63ED 2872 bytes
font_01_sfnt_off00006e13.bin
c0601d7d392639ba8793eaf0009fc714632e8b07fa04eb43c2f1617ccd616f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E13 5080 bytes
font_02_sfnt_off00007f49.bin
f2187f8b1c44ae6378aa26a6bc3ec93ec4dfebdde44a0ec7ea005666416be08b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F49 10432 bytes

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