Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e672a89ce882e12…

MALICIOUS

PDF

45.2 KB Created: 2020-08-14 13:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62e2dd5d48e8ce9c6b019bca5aa6c130 SHA-1: 51902e3f44ca33ba9601d61fac32c653dbe121b9 SHA-256: 3e672a89ce882e12aeed459fdef0feb8e21652be03e1e04d990536777924214f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One prominent link, however, redirects through `ttraff.ru`, a known malicious redirector, to a page offering a 'CEH certified ethical hacker bundle PDF'. This indicates a social engineering lure to drive traffic to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=ceh+certified+ethical+hacker+bundle+pdf
    • http://files.penrithrowing.com/uploads/1/3/1/3/131379639/8000890.pdf
    • http://files.haltnorth.com/uploads/1/3/1/3/131379113/jusunuziwad.pdf
    • http://files.dieckfamilyreunion.com/uploads/1/3/2/3/132303007/623d5ab054078a7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/zimibogiwimokavubu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7329/0908/files/jokulojozuju.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/dosidavexu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/13174405660.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/78374054043.pdf
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/gugofokipire.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/birds_photos.pdf
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files/gasixesusupanozatorow.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/matuvi.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_off00006d46.bin
a1e2df16cbbe0ef4c3cbd41d72f4d0a3f17b988617ac1e1beb213ec362fedfcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D46 5172 bytes
font_01_sfnt_off00007ec8.bin
fdd4f2d3bc8b14edec05800e561b792c6ed56202af4d05418122b8e92c5918e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC8 12668 bytes

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