Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a2aef81e839842…

MALICIOUS

PDF

49.5 KB Created: 2020-09-03 03:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 708e524b9f5e99fefbcbcc3755b2bd8f SHA-1: a13d508b648688652f6c7f6e00e670a565bfd7e9 SHA-256: a9a2aef81e83984264ac27e639408a06a9691047b35520b4c86483d7f568d04e
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to a "Bisphosphonates dental consent form" and embeds a significant number of external links. One of these links, https://ttraff.ru/wix?keyword=bisphosphonates+dental+consent+form, is identified as a known malicious redirector. The presence of a large number of links, many hosted on cdn.shopify.com, suggests an attempt to manipulate search engine results or distribute malicious content through a link farm. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent appears to be redirecting users to harmful sites.

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/wix?keyword=bisphosphonates+dental+consent+form
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/47287107282.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/digestive_system_diseases_and_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/86961694461.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/case_ih_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/git_rename_remote_branch.pdf
    • https://static.usrfiles.com/ugd/d216cb_c43df69038a64f9fa4f3528b23661734.pdf
    • https://static.usrfiles.com/ugd/b30cf0_b3e79c3980354d3c9697859a43c64ad5.pdf
    • https://static.usrfiles.com/ugd/1decf9_c125219eaaa044e3b37046b934766dea.pdf
    • https://static.usrfiles.com/ugd/69695d_bd7f5bb793174c18af559101c576dbd5.pdf
    • https://static.usrfiles.com/ugd/8a419d_e20039033b9e476f8f7a269e8410e861.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbd9e75d778640b4b357b5f909b12d62.pdf
    • https://cdn.shopify.com/s/files/1/0436/5742/9145/files/raladidudimi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4323/9589/files/58223880610.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/mijeranezo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2033/files/47457960960.pdf
    • https://cdn.shopify.com/s/files/1/0440/5759/1960/files/zugoxilewozebe.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_off0000787b.bin
b17df924eb9594fffce9578cc0e2b825e8ec75fb4afcbfca5c9bffbd1caa0783
pdf-font-stream PDF embedded font (sfnt) at offset 0x787B 5444 bytes
font_01_sfnt_off00008adb.bin
6620e236439f8100de0fb6f24c370f5f63ca10f85db373d06d1abddfd8eae7f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADB 14836 bytes