Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b00349608567cb…

MALICIOUS

PDF

42.9 KB Created: 2020-08-20 20:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a309426767122d721dfb6f565b24be28 SHA-1: d227933c7a483ed0987d3e3f71fdeb28cb403660 SHA-256: d3b00349608567cb0c805a6e0dd551b5dece5e5a9f7cf9b6201c74788caf27a8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with the primary link redirecting to a known malicious domain. The document body and heuristics indicate a lure for a 'free PDF pattern', which is a common social engineering tactic. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded links are sufficient to classify this as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=wrap+dress+pattern+free+pdf
    • http://files.theonlynatalienicole.com/uploads/1/3/1/3/131384777/pinisegepeviji-kodebag-jerupo.pdf
    • http://files.maitriyogachester.com/uploads/1/3/2/6/132680986/442935.pdf
    • http://zuzagora.johnromeromusic.com/uploads/1/3/1/3/131383483/536509.pdf
    • http://wafuvebuf.boyntonedits.com/uploads/1/3/1/4/131453060/634648.pdf
    • http://files.gabriellecaitlynphotography.com/uploads/1/3/0/7/130776308/c858fdba0ed.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/48301366333.pdf
    • https://cdn.shopify.com/s/files/1/0463/3165/8395/files/breezin_thru_theory_chapter_4_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/beamforming_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nedodakamilutejevojive.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/polygamy_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/48599272906.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/beramojejop.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3791/files/fapazomevezanufer.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2813/files/kobapumisonexoxip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b5.bin
6f960a859282c922b6a5e757cb0ebe18c8903112230d8176a66dfdb243bd1572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B5 5016 bytes
font_01_sfnt_off00007ae4.bin
e2529a73354aea28cb94e586cce37efdf89f5369be2b71f78b2820d9119e12e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE4 10480 bytes

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