Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf67702372b7da0…

MALICIOUS

PDF

39.5 KB Created: 2020-08-23 09:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58d7fd6e568eb0f83e6fd49eea22cae1 SHA-1: 74b9eccfb4b8c4864d9aeb61b3c874d5f4a545ea SHA-256: bcf67702372b7da0f3bd1ebeeb1714053e0440b0cffc8f8724521fc03239acdf
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=great+compromise+of+1787+worksheet'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify URLs, reinforcing the lure mechanism. The primary intent appears to be directing users to malicious or potentially malicious external content.

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=great+compromise+of+1787+worksheet
    • http://sudunesa.thequestofjz.com/uploads/1/3/0/8/130814229/koninoxawibipop_bakukarelema_sukadawilex_bipadozebozoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/nivejip.pdf
    • https://cdn.shopify.com/s/files/1/0429/4089/1292/files/motumifenoted.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3346/files/76065229933.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/wafimowezuruk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56697352128.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/79341701132.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/12657959510.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/12210756530.pdf
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/dips_academy_abstract_algebra_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/voduxezozejubudafoluxada.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/internal_and_external_validity_in_quantitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0462/8440/6944/files/adobe_photoshop_cs5_tutorials_free.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_off00005aef.bin
2a24a32aea6652722d353a61753041bb4cd1a27008da1d032880fa805bdc089b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEF 5736 bytes
font_01_sfnt_off00006e7a.bin
4238c2d3c4ce435720a02f953a2593268ba37299fd07dde99c941482cfb08a77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 10280 bytes

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