Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02d7259858e5f8b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-21 21:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b846d2f395c1c0c248ac2a4ad4310c7 SHA-1: 0e54d657e8a0f3fdde0a29b149a0517e9613e836 SHA-256: b02d7259858e5f8b99a36c436f2880ed3c6f41563f080823cc253377524f1e18
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. This suggests the primary purpose is to lure the user to a compromised or malicious site. No scripts were extracted, and the PDF structure itself is the vector for the attack.

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/pify?keyword=kensington+aldridge+academy+6th+form
    • http://files.caravelacademylibraries.org/uploads/1/3/0/7/130739971/b0acde84.pdf
    • http://sawodu.concordlawncareservices.com/uploads/1/3/0/7/130738720/3593307.pdf
    • http://wezoberoz.pureexistencedance.com/uploads/1/3/0/7/130739892/4077893.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/96_lincoln_town_car.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/17094122062.pdf
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/ts_16949_standards.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/pozanirerigixufizogozop.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/18780959651.pdf
    • https://cdn.shopify.com/s/files/1/0437/3472/8853/files/1024274797.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/baby_boy_names_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/zefigazifokukujizexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/sagibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3450/8455/files/agrarian_reform_history_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/nutrition_malayalam.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_off00006b19.bin
febc03d17bb37b0e26a7fe4a0bc7ff276563f9a40f5d7eef328feda800016432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B19 5660 bytes
font_01_sfnt_off00007e36.bin
637aaae665bdb5d065e3d2c052547b4d55b046e1502e03b9ec22ca7e2f0e3a93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E36 10208 bytes

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