Malicious PDF — malware analysis report

Static analysis result for SHA-256 c455c55379ee41e1…

MALICIOUS

PDF

105.2 KB Created: 2020-10-02 09:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ade5a1d4d79a648a2ffea213e36783c3 SHA-1: cc26fc8aefaa438134d2c3073414e32030dbd0c4 SHA-256: c455c55379ee41e134f48314d0d8d4b2b4931658b9de8d3f07cf9acbd8bc522f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or link farms. The ML classifier also strongly indicated maliciousness. The primary goal appears to be directing users to potentially harmful websites, likely for phishing or malware distribution.

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://gettraff.ru/strik?keyword=complete+adjective+list+pdf In PDF document text
    • http://files.zazenphoto.org/uploads/1/3/0/7/130738889/kafuzijukifo-vibexetarukuk-zisap-rizebipiko.pdfIn PDF document text
    • http://bozad.wren-project.com/uploads/1/3/1/8/131871597/f5642ef898a25.pdfIn PDF document text
    • http://files.wetwoody.com/uploads/1/3/2/7/132740378/reverugukotovokalup.pdfIn PDF document text
    • http://jegejip.integrated-health.net/uploads/1/3/1/3/131398102/famaguw.pdfIn PDF document text
    • http://kolok.wheektown.com/uploads/1/3/1/0/131070705/9f8a14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6940/2016/files/42282704214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/6361259585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/back_at_the_barnyard_kid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5753/2065/files/14195062831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/avast_antivirus_pro_license_key_till_2038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d408b4-e22c-4a97-8cd2-055c24f13305/84735338074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1faf4cfe-6400-4697-9ade-3c7c71902934/64576059635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3454a78b-7792-446c-a7db-4703ab2ebcf5/jalimobomusutax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9ab183-f4d0-4ab3-a051-7273feee95f4/zonerexeguwotiboxinazupen.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16146 5244 bytes
SHA-256: 529a48236a6bb2423fceef64ff8218f76f9ed98798249460f2bdbee27e80b48f
font_01_sfnt_off00017319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17319 10936 bytes
SHA-256: 6cdac134451752599f79a9a972a506922793a79a45f8f7c64bf41c052070ebb5

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