Malicious PDF — malware analysis report

Static analysis result for SHA-256 09336b8351defd6d…

MALICIOUS

PDF

65.9 KB Created: 2020-08-09 17:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd439e6c4e61a4bbd154d99aba9de574 SHA-1: ca4776ca35346522d8e1143d537c467ad363c81b SHA-256: 09336b8351defd6d8326811b8bb2d4e23d61faf4ace065721bb7a033542d4023
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 or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The document body and embedded links are designed to direct users to potentially harmful websites.

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=ards+definition+pdf In PDF document text
    • http://ruxakomot.bythebible.org/uploads/1/3/2/7/132710621/8c0030e8.pdfIn PDF document text
    • http://files.merimbulaunitingchurch.com.au/uploads/1/3/1/3/131398177/pinepo-sojepojomuberib.pdfIn PDF document text
    • http://files.americanexport.info/uploads/1/3/1/6/131606502/xopeno.pdfIn PDF document text
    • http://wafiwoj.outdoorpaintersofminnesota.org/uploads/1/3/1/6/131637254/vajano.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/1/0432/5045/0600/files/swot_matrix_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/14114551707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/rojufepadewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/37619757555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/99344123940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0982/5174/files/61983266778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/732001946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/50891491728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4355/1392/files/42218655081.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_off0000c5e4.bin
6b1e399af5e5e61aedbcc102b00169c1a50ea38f7a6c39d50c11daebeaaff4b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E4 4780 bytes
font_01_sfnt_off0000d63c.bin
abb0970a151996c23bcfbee5642d447f556d49c473ace9da3cb4463189034141		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 11280 bytes

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