Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ca2c660154802b…

MALICIOUS

PDF

42.2 KB Created: 2020-08-22 04:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86b0992f2b2eeef0ed1b0a06be022176 SHA-1: db844a9dbf184998c3d2d3b2dc79a5ea751d009c SHA-256: d7ca2c660154802bb3cb1060a8802f542ebadcb063ff31ef19dd4d0aa52a3109
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL, https://ttraff.cc/pify?keyword=best+chord+recognition+app+android, is designed to redirect users. The document body, though heavily obfuscated, contains references to the topic of the malicious link, suggesting a lure to a potentially harmful external resource. The presence of many links to Shopify domains, some marked as benign, is characteristic of SEO link farm techniques used to obscure malicious intent.

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.cc/pify?keyword=best+chord+recognition+app+android
    • http://files.georgesweeneyarchitect.com/uploads/1/3/0/7/130739719/8363314.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/catalogue_pompe_caprari.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4780083199.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/xupinerebogabiwodudefir.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/38241756952.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/rolegopoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8969/files/limbajul_trupului_in_dragoste_allan_pease_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5557/files/77420377246.pdf
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/hdfc_bank_credit_card_closure_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2761/files/convert_html_to_api_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8220/9698/files/12637033081.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/88764499478.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_off00006751.bin
f23101df8dcfdcfaf0577046078444fe7bacd1b506ffdc81b5629252b81b99d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6751 5352 bytes
font_01_sfnt_off00007979.bin
eb0169a195c6e8073ba7f3ad6361b27270d3e641a78167217ef7a012d1da59f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7979 9980 bytes

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