Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b8bea9215db1de…

MALICIOUS

PDF

42.3 KB Created: 2020-08-14 21:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0796a3eafb0baeee025bfdb76cf59633 SHA-1: d5bb36da1a81623c11b86ed8ded68ad0ac208f41 SHA-256: 52b8bea9215db1dea872314c4deef4b0b528072ed15b19e80421445f45e2db1a
168 Risk Score

Malware Insights

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

The PDF document contains a lure for installing a browser extension or update, a common social-engineering tactic. It also includes a link to a known malicious redirector, ttraff.com, which is likely used to serve the actual payload. The document body contains obfuscated text and embedded URLs, including one pointing to a potentially malicious PDF file.

Heuristics 5

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chrome+apk+for+android+4.+1.+2
    • http://files.nruzycki.com/uploads/1/3/0/7/130739892/6c8270.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/ulisse_aldrovandi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/cinematography_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0440/5500/3286/files/8218917909.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/domodidemikab.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/51771872469.pdf
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/android_version_names_a_to_z.pdf
    • https://cdn.shopify.com/s/files/1/0453/2440/2843/files/developmental_frame_of_reference_occupational_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0434/0449/2957/files/zofijufamikumeraxuvo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/lusogek.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/80548303458.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/37082131324.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_off000066bf.bin
547595a1459f56c1b750cd449d9ab2a62579f04cc496419a287a7ecd38fa44a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66BF 5344 bytes
font_01_sfnt_off000078d5.bin
556ed7f4f8b295ed0a5b3a0366a11e755a793224e6534d394c163099b396da66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D5 10552 bytes

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