Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f34fb157be2ff74…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 10:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 980dbbf8abaab561162b745436f9bc87 SHA-1: 2f98f577223e7d591f50bed7135f4431f8ebdabc SHA-256: 8f34fb157be2ff743b00e774cac47dd99edf83699b449e0c639d16ece665117e
160 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure, disguised as a software review. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates that the document's content is designed to trick the user into installing something, likely related to the malicious redirect. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to attract traffic to the malicious redirector.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wix?keyword=iskysoft+itube+studio+review
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/58288114156.pdf
    • https://cdn.shopify.com/s/files/1/0462/5301/5189/files/bachelor_of_business_informatics_uc.pdf
    • https://cdn.shopify.com/s/files/1/0433/3115/8175/files/bible_stories.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/bsc_physics_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/29101779828.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/sasosagibupagoxotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/88570219452.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/payment_summary_annual_report_due_date_2018.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c66bee8f36240ab9f0693405fe6d8ca.pdf
    • https://static.usrfiles.com/ugd/95089d_5bfe3ae91b93483d91d18f6684a80dce.pdf
    • https://static.usrfiles.com/ugd/7f46b5_eb3825fc53e04c9c9f5446381949f31f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c158ba2cfbc04189b35daf60ae48f1cc.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_b3652a9ef9864a60b717c3250051b483.pdf
    • https://static.usrfiles.com/ugd/b8c837_f08d4455223d4501a91f53f91d3fba49.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60cd8f06b924f328f848dbd3edab18d.pdf
    • https://static.usrfiles.com/ugd/299074_dba75706293b4b8ab832fa971bf2ef9b.pdf
    • https://static.usrfiles.com/ugd/868401_8826c9a127bd416694a9f06cc710aa2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a9734a297ca4871a6edb910b305b522.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_off00006a63.bin
96990db829f31e44a9bd1da6435f1f78f855fb31ada67fe641f7248152c7d9d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A63 5052 bytes
font_01_sfnt_off00007bbb.bin
3ecc6cffc71a332ba5cc040ce77524c3b5c286a1dc18de3be2c2c427163ee966
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBB 10084 bytes