Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ad287feac96c11…

MALICIOUS

PDF

45.7 KB Created: 2020-07-25 16:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e9f4c6ab12102ee10a30549d19cc035 SHA-1: 18f2611c4a11489c07ce0dc703c94a98734777a2 SHA-256: 38ad287feac96c11888af73abec9b8a89a659f8af6941fa18ba99446e84badaa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link/Script: User Execution: Malicious Link T1566.002 Phishing: Spearphishing Attachment

The PDF contains a critical heuristic indicating it's a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=vpn+in+chrome+browser+apk'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to PDFs hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Vpn in chrome browser apk', aligning with the SE_BROWSER_INSTALL_LURE heuristic. This suggests a social engineering attack aiming to trick users into installing malicious browser extensions or updates.

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/pify?keyword=vpn+in+chrome+browser+apk
    • http://files.4therochesterraiders.org/uploads/1/3/1/8/131856331/6792503.pdf
    • http://files.leblancsdistributingcompany.com/uploads/1/3/0/8/130814397/jalejegorix-fojaxabetesip-wudobamurikav-fopar.pdf
    • http://files.noexcusesbrandshop.com/uploads/1/3/0/8/130874585/ropekixoteno_sewumaf_ropob_sizasodesifug.pdf
    • http://files.newmexicolegalhelp.com/uploads/1/3/1/6/131637841/cacd41.pdf
    • https://cdn.shopify.com/s/files/1/0433/8843/6643/files/1017275095.pdf
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/43989929878.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/vowiwi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/migiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/48435214161.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pizejop.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/58853156977.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/bodubor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8720/files/gimunubenaxalifugez.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_off000074d7.bin
c3635aadb974c613d202b87460b76b05ff7678088ac36244c77e95d5d084d289
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D7 5108 bytes
font_01_sfnt_off000085f9.bin
1ee5cd74e34447094a6da8a960fad1a40de42379e1240a8d5cd5878889715175
pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 10580 bytes