Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f8a6bd79357b4d…

MALICIOUS

PDF

51.5 KB Created: 2020-08-05 23:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b1ef7726d0b57b2b48244495cb0d662 SHA-1: 2f664e7323881635d2ed84c6297713d9eb2c59f8 SHA-256: 78f8a6bd79357b4d08bc6ee795f1afdaee882a2f6d71262e1442533734b2ffb0
120 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 hosting other PDFs, and one critical link to a known malicious redirector at ttraff.ru. This indicates a link farm or redirection scheme designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, reinforcing the 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.ru/pify?keyword=hernia+inguinal+directa+pdf
    • http://files.mad-artist.com/uploads/1/3/1/3/131383657/ninoxasotelasudox.pdf
    • http://files.joyspringseternal.com/uploads/1/3/1/3/131383255/509412.pdf
    • http://files.jonniekae.com/uploads/1/3/1/8/131856071/givib_suzut_wizer_wifode.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/fiwis.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/zujovanaxumaxelukir.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0955/files/cardiac_bed_making_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/formato_apa_sexta_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/katezapemunuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/30854599849.pdf
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/58226735366.pdf
    • https://cdn.shopify.com/s/files/1/0440/8652/6102/files/12437103019.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nosisuzamozozi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/nerapiwi.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_off0000893d.bin
6b03c2ec12795764c60bf9b59f95fe1e1ca27f519158f7c5840e0021b077faab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x893D 5108 bytes
font_01_sfnt_off00009aad.bin
6452c5bb7e08ca52e2341f5cb4831789af7001f87578e22f188ad7b494bfe807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAD 11188 bytes

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