Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe496b7bc093613…

MALICIOUS

PDF

39.9 KB Created: 2020-08-15 01:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bce259f184b560f417aca6679160c73 SHA-1: f82bfd53fb26fc7bc688e6ccbbec5f0780dae0a8 SHA-256: 9fe496b7bc093613d4e80a3cb87ed589e9556b0dd222b848d51a176dbd262c87
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 pointing to Shopify domains, which is indicative of a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=brain+abscess+treatment+pdf', is identified as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure under the guise of providing information on medical topics.

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=brain+abscess+treatment+pdf
    • http://files.watercolorcreativitylessons.com/uploads/1/3/0/9/130969761/6147609.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/madenudagulupemumojurow.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/sejopoluki.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/girulakejufisuzomil.pdf
    • https://cdn.shopify.com/s/files/1/0433/4105/4105/files/36297668798.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6490/files/familia_cephalotaxaceae.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/ziwisezobiku.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/fonevumafiga.pdf
    • https://cdn.shopify.com/s/files/1/0451/4365/4565/files/69928754145.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/luzon.pdf
    • https://cdn.shopify.com/s/files/1/0431/8281/7441/files/protein_synthesis_process.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_off00005f37.bin
a4605efbd561eb48edb4a45a58f911b3bd7a8dc1501632ac5c8cae336c5125a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F37 5456 bytes
font_01_sfnt_off000071a0.bin
cda4a489ec2365c719630f71102523b45e1db56aa8778ad2e349329c6ac0722c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A0 9776 bytes

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