Malicious PDF — malware analysis report

Static analysis result for SHA-256 854a1bde090a2da2…

MALICIOUS

PDF

43.4 KB Created: 2020-08-02 13:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91170273a315b0e2e8af1ce5afab2608 SHA-1: 689e6cc2e050795f462cab9113b65e7ca33247d4 SHA-256: 854a1bde090a2da23313aeefb3b081ca223fa2f0ee2ed9b6cd4e9a78be185230
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its extensive use of external links, a technique often employed to create link farms for SEO manipulation or to redirect users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=mythic+nythendra+guide as a known malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, with cdn.shopify.com being a dominant host for these links. The document body contains garbled text but includes the malicious redirector URL and several Shopify URLs, reinforcing the link farm and redirection attack pattern.

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=mythic+nythendra+guide
    • http://files.seldomsky.com/uploads/1/3/2/3/132303126/2c6109fa42baa.pdf
    • http://files.mljanderson.org/uploads/1/3/0/7/130775980/6a668561.pdf
    • http://files.gertrudekatzchronicles.com/uploads/1/3/1/3/131379510/8219617.pdf
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdf
    • http://files.ots-adventures.com/uploads/1/3/1/4/131437987/buvebibojudifol-befinananaj-xirej-lefano.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/kabasikuruxexopupakav.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/54057041656.pdf
    • https://cdn.shopify.com/s/files/1/0431/9179/5875/files/84910631221.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/36989936826.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/guwevaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/57186042990.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/47391516374.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/xujifezapulesudarisis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/nuxedofamogakazala.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/90165351755.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_off00006c19.bin
c22430657f082eefcfdf2e74a112c80c54c54bb07d9208adfe13dd0807ccdb9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C19 5096 bytes
font_01_sfnt_off00007d7b.bin
47b57fc476731f5c5ce6da1e6d56e3da619712c87c76d494ef4979e7a39d0c77
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 10496 bytes