Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcd822af11767ff…

MALICIOUS

PDF

42.2 KB Created: 2020-08-10 06:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7bd8207e4e9f2617993a8b4aee0d76a SHA-1: 58489c73edf5e1cea55954517e06df917cd7e3f9 SHA-256: 2fcd822af11767ff43d9755e87ce796f52ad6a0ea84279be534a82257d2af427
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the presence of the malicious redirector indicates the likely intent is to lead the user to a malicious site for further exploitation or phishing.

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.cc/pify?keyword=nitrogen+cycle+pdf
    • http://files.guardianwildlifeservices.com/uploads/1/3/1/4/131438137/22022fa4f0e09.pdf
    • http://files.moregraceoutreach.com/uploads/1/3/1/6/131636654/nukinejifepoginik.pdf
    • http://files.awwca.com/uploads/1/3/1/4/131453034/fobafawomujadezek.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/41026845425.pdf
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/tabadariraroxafegilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0366/5822/files/wemope.pdf
    • https://cdn.shopify.com/s/files/1/0440/7525/3910/files/compare_and_contrast_graphic_organizer_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/antonin_artaud_books.pdf
    • https://cdn.shopify.com/s/files/1/0436/2305/5523/files/cat_skins_for_minecraft_pe.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/sownik_angielski_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/2929427900.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/78656001735.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/attestation_d_hebergement_visa_etudiant_france.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c58.bin
853c1d14097c3c8da613dd51b50a757e9d69eae05a3f9208ce7b6c33feb98761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C58 4796 bytes
font_01_sfnt_off00006cc2.bin
32c3f3d5b28e57174313c9ecc567a5873e742f4fc5cc4f8d8e9c0661b892ded8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC2 9732 bytes
font_02_sfnt_off00008e07.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E07 4324 bytes

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