Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36c7fc255e38d5f…

MALICIOUS

PDF

39.2 KB Created: 2020-09-06 21:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab7b84c01e40c696ca3bb6ba86016a68 SHA-1: 36b5e010898e17d6e7ba8cc57603b779b7736cfd SHA-256: f36c7fc255e38d5f0be39e5b279b9efb20cd6632d9eb742cdb6ff9b4d3f6facd
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.club/wix?keyword=anatomia+ilustrada+de+cabeza+y+cuello+pdf', is identified as a malicious redirector. The document body, though partially corrupted, includes the same URL and a title suggesting a lure for educational content, which is a common tactic for phishing or malware delivery.

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.club/wix?keyword=anatomia+ilustrada+de+cabeza+y+cuello+pdf
    • https://cdn.shopify.com/s/files/1/0461/6463/9896/files/between_the_sheets_drink_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/90711140862.pdf
    • https://cdn.shopify.com/s/files/1/0463/2572/7387/files/videohive_circles_slideshow_free.pdf
    • https://cdn.shopify.com/s/files/1/0457/8073/0012/files/gingerbread_man_template_to_cut_out.pdf
    • https://cdn.shopify.com/s/files/1/0437/8142/3262/files/bhangra_dance_information_in_gujarati_language.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/83218539362.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jerozex.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/58302047700.pdf
    • https://static.usrfiles.com/ugd/31593d_6631d4b47090477d9429110e77f0b433.pdf
    • https://static.usrfiles.com/ugd/b8c837_892d3fbbb69d41a09f1340ce68271130.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_off000059b5.bin
17a2e7067f51a8cfd60d219959cbf430dd0a94ab706bbce11ff522a4fea8a471		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B5 5584 bytes
font_01_sfnt_off00006ca9.bin
f73d1ee5f914ac484d1e514232d8fccacaec5905169a0a1603836812a1476ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 10808 bytes

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