Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e633a49cbbe2524…

MALICIOUS

PDF

43.0 KB Created: 2020-08-11 06:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b23d0d99c97999e22d32e2bcfbeb87c5 SHA-1: ffbfecb897e3af848cbd9fe4ae7c3c6437fd329d SHA-256: 4e633a49cbbe2524544a282e864fcc3921f7161331780f8d959db3add20fd953
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a large number of embedded links, many of which point to external PDF files. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=braverats+rules+pdf', is identified as a malicious redirector. The document body contains obfuscated text and metadata related to PDF creation, but the primary malicious activity appears to be the mass linking to external resources, likely for SEO manipulation or to serve further malicious content.

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=braverats+rules+pdf
    • http://files.lvpoutlet.com/uploads/1/3/0/7/130775393/sumirinomo_radoguwos.pdf
    • http://files.daviscountydoulas.com/uploads/1/3/1/3/131379042/kuxaguriku.pdf
    • http://files.xminimumy.com/uploads/1/3/2/8/132815004/dd409a.pdf
    • http://files.yayaandlou.com/uploads/1/3/0/7/130739791/7e59db13d70c.pdf
    • http://files.galindasjewelry.com/uploads/1/3/1/4/131413040/9301055.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/mebisoresu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/aritmatika_dan_geometri.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8325/files/spotlights_on_anesthesia_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/wilosajowijodipif.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/danigapilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/nuravurulonivadujavadexis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/zonipuwutovogepopim.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/jutuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/70291736540.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/vuluzofuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/can_t_take_my_eyes_off_you_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/zuparopixure.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7498/files/viwobufakuma.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_off00006916.bin
fe4b0928383e24c93b33b4c115d0508370a95eb879130e431a3fa41dda6e8a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6916 5144 bytes
font_01_sfnt_off00007aaf.bin
c9349482d1b9dc5ac031426d53d817f5dbeb2cbe1cd5b87b58c4a132704e8e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAF 10792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.