Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9566082c72248b0…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 02:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fbeff6b8fffb8d160a549f7cfc37322 SHA-1: 90838289c2057e6a08caa7bb31f26ce5304618af SHA-256: b9566082c72248b0711aa5b9d611d4ae89fd42f4bb21103871e76071c741451f
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 specifically pointing to a known malicious redirector. The document body is heavily obfuscated but contains the same malicious URL and numerous other links to PDFs hosted on Shopify. This suggests a link farm or redirection strategy to distribute malicious content or manipulate search engine results. No scripts were extracted from this sample.

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=bolton+school+sixth+form+twitter
    • http://files.southofnorthbeer.com/uploads/1/3/1/4/131408103/5539903.pdf
    • http://files.lionessprayer.com/uploads/1/3/2/7/132710765/f5c0bedaa.pdf
    • http://files.cupcake-couture.net/uploads/1/3/0/7/130775679/236e92.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/fuwokubewezuvuxija.pdf
    • https://cdn.shopify.com/s/files/1/0436/7217/4745/files/67029287449.pdf
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/mekolugotefawevidifimono.pdf
    • https://cdn.shopify.com/s/files/1/0436/3350/8512/files/29067263206.pdf
    • https://cdn.shopify.com/s/files/1/0429/3335/4659/files/rental_deposit_refund_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/online_editor_with_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/html_strike_through.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/27724672265.pdf
    • https://cdn.shopify.com/s/files/1/0440/5503/6054/files/esc_angina_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0437/6746/4085/files/john_shelby_spong_books.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_off0000637f.bin
123e0759b70b14b25635a95bf178398c605e3da3ae714d2e96c7fe18af77b717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637F 5120 bytes
font_01_sfnt_off000074d5.bin
aad8b6df243dc20dc1a58f449b05df5d358390afb064fbf3bcc52f31211819e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D5 10556 bytes

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