Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbd254c06e054d7…

MALICIOUS

PDF

39.6 KB Created: 2020-10-05 04:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 237b84ae2672b87006960e803770536c SHA-1: fa0f0916ca7448f5939ddd8c247963bb705dc040 SHA-256: dfbd254c06e054d73e42e0ab4a3c156135222b716b35620d728812341e1fc0ca
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The document body includes a link that appears to be a lure for 'mobile pet vac anderson sc'. The presence of multiple PDF links, some pointing to Shopify and Mozfiles domains, indicates a link farm strategy to distribute malicious content.

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=mobile+pet+vac+anderson+sc In PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/daloludejixomadaxugogo.pdfIn PDF document text
    • https://site-1038578.mozfiles.com/files/1038578/vifafuja.pdfIn PDF document text
    • http://files.retrodiodes.com/uploads/1/3/2/7/132740905/3d3f4978f92.pdfIn PDF document text
    • http://files.transformationsbyerin.com/uploads/1/3/1/4/131453248/309337.pdfIn PDF document text
    • http://nisuzozuv.exploringmicrobes.de/uploads/1/3/0/7/130740368/bizutelerala.pdfIn PDF document text
    • http://files.dominiquemillette.com/uploads/1/3/2/6/132681823/moparovawasiledola.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/1/0434/3191/9765/files/xikoxujitomasamemus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3507/7019/files/61284773600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4852/1887/files/bubakajux.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_off00005cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB8 5272 bytes
SHA-256: 28e033e25e40b71b1693a5643790d33267e130b7b9ea1d4d773959c079de2a2b
font_01_sfnt_off00006ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 10364 bytes
SHA-256: 9cf39a0f0c4e1cf183d05827032a9f952846ff8bcc7710922b3ee2b043ca6658