Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2fb56e75f810e21…

MALICIOUS

PDF

53.8 KB Created: 2020-08-06 19:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5debeb10fae85b46bc0907bdc7bc0b0d SHA-1: a718c62f97efe2f92ffa85287711515166a217f4 SHA-256: b2fb56e75f810e21c3254584a8ed7e979e43a863168ff2378b6bbdc43e7a614c
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, many pointing to Shopify domains hosting PDF files, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning tactic designed to lure victims to a malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector URL is the primary indicator of compromise.

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=babbitt+book+pdf
    • http://files.alyssiamiller.com/uploads/1/3/0/8/130814238/2145506.pdf
    • http://files.latonaschoolassociates.com/uploads/1/3/2/6/132682051/zeletojoveg.pdf
    • http://files.greenlawconstruction.com/uploads/1/3/1/1/131164462/zisofulur.pdf
    • http://files.wasagabeachcorvetteclub.com/uploads/1/3/1/0/131070398/mileluna.pdf
    • http://files.mrbeckett.net/uploads/1/3/1/3/131380482/3999171.pdf
    • https://cdn.shopify.com/s/files/1/0449/8066/6526/files/gazebo_with_mosquito_net.pdf
    • https://cdn.shopify.com/s/files/1/0439/0171/4587/files/29895677464.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/typhoid_fever_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/42401409267.pdf
    • https://cdn.shopify.com/s/files/1/0434/5007/3240/files/anarcho_syndicalist_review.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/22153821296.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/75191459211.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/vorafetovelupolubupoja.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/18419046050.pdf
    • https://cdn.shopify.com/s/files/1/0431/7288/8742/files/php_json_response.pdf
    • https://cdn.shopify.com/s/files/1/0435/3009/2696/files/hustler_fastrak_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5221/files/c_for_beginners.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_off00009638.bin
8d38d0ce3f8bf7abb08198655bd45de3a7383f4db96989aa959600ffea731976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9638 4984 bytes
font_01_sfnt_off0000a743.bin
a166da3b950da7aa283fca0941b0f0ddc6b67dca9a1cc8b40ca37a7e1969b379		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA743 10380 bytes

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