Malicious PDF — malware analysis report

Static analysis result for SHA-256 410ef54e178101d4…

MALICIOUS

PDF

50.3 KB Created: 2020-08-12 21:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d022f504edc5ce3076cf13aaee3adaa1 SHA-1: 21b193173a734cf989bc8eb54c0ff3952e5af109 SHA-256: 410ef54e178101d482d9200021debff58fd30fe75c29a29a69cc0ddfcef2a65a
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=basic%20brain%20anatomy%20pdf'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute the malicious PDF. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=basic%20brain%20anatomy%20pdf
    • http://files.lawyers4drs.com/uploads/1/3/0/7/130739204/lumaf.pdf
    • http://files.structuredevelopmentnw.com/uploads/1/3/1/0/131071145/nobolazow-tuxoxugep-mekazazufobi-puseju.pdf
    • http://files.evavoutsaki.com/uploads/1/3/1/4/131454286/xibuz-kuvagojaxuf.pdf
    • http://files.nicksforzaferrari.net/uploads/1/3/1/4/131411411/tosefipakodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/83250726386.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/28406552326.pdf
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/65408393482.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/jozevotamelizel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/44868677403.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/drake_all_me_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/a_practical_english_grammar_exercises_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/xuginese.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/67754924966.pdf
    • https://cdn.shopify.com/s/files/1/0443/1101/9676/files/46703379810.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8115/files/33114541711.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/kadez.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_off00007add.bin
4e98056b4b5a393359010ac101b2210fd4503bccef66f0c28de5ba21887eab5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADD 5228 bytes
font_01_sfnt_off00008c7b.bin
1ab30cf883f4a7720afd5f8126e5dbd4b9c65896b2f4a03545e2098ce45cf9df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7B 9948 bytes
font_02_sfnt_off0000ae70.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE70 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.