Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d06dad76454c75e…

MALICIOUS

PDF

53.5 KB Created: 2020-07-27 16:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08776c6d3d157dabbf5bfd5e474f05cf SHA-1: 66910016176765e28b415ef10b2dca1cf98e4d53 SHA-256: 0d06dad76454c75e5ecf9350f73681b1ac7b368534386c7a5a2c6c86547af67d
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 a redirector service known to host malicious content. The document body is heavily obfuscated, but the presence of the redirector link and the sheer volume of outbound links suggest an attempt to lead users to malicious websites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=business+english+idioms+exercises+pdf
    • http://files.andreagammon.com/uploads/1/3/2/6/132695692/kekag-rojorojadaw-kosefumurodokaw-vizituwaza.pdf
    • http://files.markkeohanephotography.com/uploads/1/3/1/4/131409794/f317e5c2.pdf
    • http://files.ayurvedaora.com/uploads/1/3/0/7/130776518/popuwasesemupil_bezata_tuwuvikotugedi_fusaga.pdf
    • http://files.theflorecercasitasmx.com/uploads/1/3/0/7/130775588/2d35482f527.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/xonirekokukuwigowu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/temibiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/69534507548.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/tezujazeliwuwiledigamun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/juserofobop.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/kusofo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1443/files/fawokamobowojij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4944/2713/files/wevexovutituxifufefo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/sipifuvexadanarologotenu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/subegunamuxifij.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/pegutarosulekasoluza.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/tidejikolowem.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_off000091ee.bin
ba86af1adf0b2c9803c510c0c6d95c0bebfb248f64e33c50933066229a3708f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91EE 5276 bytes
font_01_sfnt_off0000a3a8.bin
1bca28dce0b6d2d76c6de27dff6dcf2ecf23a5ca382378bd0a50f6fc89322ce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A8 10900 bytes

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