Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6212db52af4877…

MALICIOUS

PDF

37.0 KB Created: 2020-08-04 03:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e265cad4e9bf2da09035d91b8a59d65 SHA-1: 368dc922b55c8b2d8dbed04fdb0bd261ddd18064 SHA-256: 0a6212db52af48777949ba60c1a8184770fca105b273b9f617ea4919596b1a58
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though partially garbled, contains text related to 'materiales dentales' and the wkhtmltopdf application, suggesting a potential lure for specific search terms. The presence of numerous external links indicates a link farm strategy, likely to manipulate search engine results or direct users to malicious sites.

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.ru/pify?keyword=materiales+dentales+ricardo+luis+macchi+pdf
    • http://files.streetambitionunited.com/uploads/1/3/1/3/131381991/5ef02e87679f77a.pdf
    • http://files.smithfieldrotarync.org/uploads/1/3/0/7/130740127/a7ec40a93adb3.pdf
    • http://files.kpuhra.com/uploads/1/3/0/7/130738513/tojuteza-rekale-fojoniba.pdf
    • http://files.road2fullframe.com/uploads/1/3/0/8/130813643/27ad95b0273b95.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/xifexorametomovojogewoso.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/67740459595.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/14228443714.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/38591737253.pdf
    • https://cdn.shopify.com/s/files/1/0437/2601/2567/files/american_government_14th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/40772646319.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/jebonokevokujovupasevage.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/68423707238.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/curso_de_ingles_iniciante.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/36407889344.pdf
    • https://cdn.shopify.com/s/files/1/0432/0546/0125/files/pdf_bestand_kleiner_maken_mac.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050de.bin
233517ddd6fdf570c02ea1f374770de513a4e657fe9bb198e6cc07688ee8dd8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50DE 5400 bytes
font_01_sfnt_off0000631b.bin
efb532c177a42b840a166e9b76ace11102c3e7059471ca423cf66005f51e0284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 10428 bytes

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