Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e7dedd2e41e8bb…

MALICIOUS

PDF

44.5 KB Created: 2020-08-13 22:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b6b749e98db29f49770d68292ee9a4 SHA-1: 1e1618c8dccddb753df2ea5da8dc8c4f83be199f SHA-256: c1e7dedd2e41e8bb42329d8fc8101e1423d0fa99132fce73315e14277d1abf97
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits malicious behavior through a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. One prominent link, https://ttraff.com/pify?keyword=bestwap+in+song+2019++war, is flagged as a malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document but rather a container for malicious links. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=bestwap+in+song+2019++war
    • http://files.thefeelgooddiary.com/uploads/1/3/1/0/131070212/riridebukowiba.pdf
    • http://files.thestpeters.org/uploads/1/3/2/7/132740564/dunaxat-wakalom-nofuvib-zofafusewafu.pdf
    • http://files.mivux.ch/uploads/1/3/1/8/131871462/mojudofejazux_nijedenoz_nikapogi_pofodafi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/xijasitugex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/82879545850.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9287/files/pasesaselezirubo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/gepolukuzilubozivor.pdf
    • https://cdn.shopify.com/s/files/1/0448/2190/5570/files/projeto_meio_ambiente_e_sustentabilidade.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/40748595749.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0004/files/54951640450.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/xesevekosebekizatad.pdf
    • https://cdn.shopify.com/s/files/1/0429/3640/2079/files/warranty_claim_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/the_birthday_party_pinter.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4214/files/rebanasajerutukukulefut.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_off000064b0.bin
25a5bda20b7b2b99291056b87072cc8db6b122aebdd6077f1f40a537597896b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B0 5580 bytes
font_01_sfnt_off000077db.bin
cb27b136954889fab0745279c6ed1007b15e26e87ba5152c2c3cadf293ee35d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 14552 bytes

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