Malicious PDF — malware analysis report

Static analysis result for SHA-256 11beebe526f50625…

MALICIOUS

PDF

46.8 KB Created: 2020-08-21 00:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7ab9f4d05176f013e1ffa6c06afb0b3 SHA-1: c1c56522e9986ab899771ef2bf93e14f7d171de0 SHA-256: 11beebe526f50625091b843088655d2306cd00998b500ac481473e2bb441d22b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious domains. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the document is designed to funnel users to external sites, likely for malicious purposes such as phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=crystal+reports+days+between+two+dates
    • http://kevitap.susansimons.com/uploads/1/3/0/9/130969077/ganejizivewesi.pdf
    • http://xesiwu.dollargeneralpennylist.com/uploads/1/3/1/4/131406352/jejale_reputibub_narisikexafovin.pdf
    • http://files.amberleyartisans.co.uk/uploads/1/3/1/4/131407958/xovodu_bewenerimotu_maxim.pdf
    • http://dikuwote.masonscience8.com/uploads/1/3/0/7/130775490/3927405.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2330/8712/files/autocad_frame_variable.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4542/files/bacteria_helicobacter_pylori_sintomas_y_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9763/files/banking_financial_terminology.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7879/files/alimentos_ricos_en_potasio_fisterra.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/67425063940.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/vumozito.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/sajugenonapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/ratip.pdf
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/36964133160.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/dutuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/jivipotafifowuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/795700343.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/46546495667.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_off0000768a.bin
8671195b31136d132d0be80ae2ea98e38bb66a4a7f368dcfcdc2ffc634842ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768A 5192 bytes
font_01_sfnt_off0000884b.bin
ea9335a60b2cf7b89cba4c7391604f131272d23f94940712eaee0ddd34a35a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884B 11028 bytes

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