Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff9982e091cb9b7…

MALICIOUS

PDF

34.8 KB Created: 2020-08-15 17:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 755c873044f6cd0403febfc574226f1e SHA-1: 407b617949bb8f0b52894d0b57f804f1e2c8c205 SHA-256: 9ff9982e091cb9b7add1009cea5283dc5509470ddc7f1c7454838c2baa9a00e0
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, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious URL identified is https://ttraff.ru/wb?keyword=essential%20hematology%20pdf, which is flagged as a malicious redirector.

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/wb?keyword=essential%20hematology%20pdf
    • http://xolike.lmcoaching.co.uk/uploads/1/3/1/3/131383949/jinonalexa.pdf
    • http://files.ir-architecture.com/uploads/1/3/1/4/131455680/fopeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/10348566303.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/76468232629.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/juvag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/49253373223.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/5000/files/11628632466.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/53278726161.pdf
    • https://cdn.shopify.com/s/files/1/0432/4284/8418/files/menotutudusozera.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/35339183341.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/rofiku.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/crossword_puzzles_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/wesemolama.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/21295248120.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_off00004bcb.bin
b3e48f18b22817e748694908e0e9b69777881ddf9fadce790ca11a191762fe38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCB 5420 bytes
font_01_sfnt_off00005e1d.bin
715f57a0312aca59f879727039f1fde395114dc7c42dc436a9edc5c1a7f2fe62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1D 9788 bytes

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