Malicious PDF — malware analysis report

Static analysis result for SHA-256 8337a659def74564…

MALICIOUS

PDF

37.3 KB Created: 2020-08-25 01:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 793bab8bd1b5e064e677ed6b21c1f733 SHA-1: 6ce78943e4310aed98da3dce424268919b789274 SHA-256: 8337a659def74564952ce9bdce556317974dffaa1d27e1973253e818c79ea3ea
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though partially corrupted, includes the same URL and a deceptive title related to 'slope intercept form solving for b'. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify. The primary malicious URL is the most critical IOC.

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.com/pify?keyword=slope+intercept+form+solving+for+b
    • http://files.mtcabinets.com/uploads/1/3/1/6/131606803/xejesasom-ribabolederik.pdf
    • http://files.strawberrygoosephotography.com/uploads/1/3/0/7/130739971/1477950.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/kesipawunoxebonusakomi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4320/9895/files/6244568070.pdf
    • https://cdn.shopify.com/s/files/1/0444/5110/2887/files/alkaline_vegan_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0436/3363/9584/files/tube_digestif_histologie.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/pofiduzolozusisilowof.pdf
    • https://cdn.shopify.com/s/files/1/0449/1906/2695/files/a_better_way_to_pray_andrew_wommack.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/stockholders_equity_balance_sheet_treasury_stock.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_off00005436.bin
dd7c7871a149f90003eec99b9ce97dfae6b67ba8d374ac32945dc027f8d6b8ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5436 5428 bytes
font_01_sfnt_off0000669e.bin
c1aec2eba14de9dd9bd5e6e5a749827f64b68ff7c08a7778ee1b0289bcc6a7dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669E 9964 bytes

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