Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7aca2450910e56…

MALICIOUS

PDF

39.2 KB Created: 2020-08-04 09:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa2cdfe1b4d420921b61718448071c79 SHA-1: cc5cde9ca598f8c2add27d87bc20c6a884d62880 SHA-256: db7aca2450910e56b90d9f26d0600b29e3e1121fce4b890a8a21122c01c06c46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a social-engineering lure, instructing the user to install a browser extension or update to view content. It also embeds numerous links, including one that redirects to known malicious infrastructure via ttraff.com. The document body text and embedded links suggest a phishing attempt disguised as a study guide, aiming to trick users into clicking malicious URLs.

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.com/pify?keyword=wiley+cpa+exam+review+2020+auditing+and+attestation+pdf
    • http://files.cobaltcommunityresearch.org/uploads/1/3/2/6/132681851/livefamebuluz.pdf
    • http://files.campbellbarnescounselling.com/uploads/1/3/0/7/130739183/fasamudavum.pdf
    • http://files.performancedobermans.com/uploads/1/3/0/9/130969831/wifeja-lifosagi-tugowizovuxo.pdf
    • http://files.benallanoff.com/uploads/1/3/1/4/131454114/pulixiweselenitiziru.pdf
    • http://files.newyorkbabystork.com/uploads/1/3/0/7/130775471/b9ef69c.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/dulenexibelaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/visual_studio_2005_redist.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/48758765137.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/vigesezavovadunube.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/36789515954.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0428/3619/7542/files/5067694730.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/77832196881.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7618/files/55374322638.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/64751689281.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/2004_polaris_sportsman_500.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_off00005548.bin
20b325d353098669013ba378356525502751962a058911e20a147d808768bb21
pdf-font-stream PDF embedded font (sfnt) at offset 0x5548 6084 bytes
font_01_sfnt_off00006a18.bin
95cebfafaaaeb877683d9581afc9e5cc30ec702826ff712773ff1d37ba8b07b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A18 10444 bytes