Malicious PDF — malware analysis report

Static analysis result for SHA-256 280a88a5a25a1db2…

MALICIOUS

PDF

51.2 KB Created: 2020-11-04 01:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c0676cd9f97849d2c7c8e9bc974476ae SHA-1: 3f14545ab73504ecf6e22242599072de07cf0387 SHA-256: 280a88a5a25a1db2288ada801d92b3a4b0e9408b704ce1a267c5f61827e9463d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm designed to manipulate search engine rankings or redirect users. One critical heuristic identified a link to known malicious redirector infrastructure at https://cctraff.ru/strik?keyword=what+s+eating+gilbert+grape+themes. No scripts were extracted from this sample, but the presence of numerous links and the malicious redirector indicate a phishing or redirection attempt.

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://cctraff.ru/strik?keyword=what+s+eating+gilbert+grape+themes In PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/lomewenidududibimib.pdfIn PDF document text
    • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/tumadasizave-sobusomiz.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/c693694562.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/1848061.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/sejewemivo_jusubebovoweda_xevotadarodebo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c69f502-9bbc-4813-bf7c-61d5c50e2b67/87701176364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20eb5f1d-550b-4bc3-a871-743d227ac577/21286698234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73222f93-9fd2-472a-b99b-758f605f00d8/33456729571.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/36886592241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3c2bee-730e-422e-af32-7666a5acc236/ronedufode.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000627f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627F 4896 bytes
SHA-256: bd7e12b2526c58947b64037b13275409b8fc6ca6ce831371fb0fc26967fd5c76
font_01_sfnt_off0000737f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 5384 bytes
SHA-256: 3ad49c5b6edf72a59673c55d88e782cdf145879f2d41f0cb7ed920c5445b9d20
font_02_sfnt_off000085af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 10704 bytes
SHA-256: e49922b9f68c1b26496010d0560338928b98720f58b3e64de38634fb9ffa88e1
font_03_sfnt_off0000aa25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA25 16208 bytes
SHA-256: d6691d7f4c8b10877bd25af26bde883dd7762551e2d4f138d151c425b6578ade

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