Malicious PDF — malware analysis report

Static analysis result for SHA-256 baabe74f6108da74…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 02:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79209b3914e1cbe4a4b58439cdd81cdc SHA-1: 90deae0abe3007fe927f42dff92bf9cfa3389853 SHA-256: baabe74f6108da74254e76d66b29749f8e71296f9637848f6557f99bb7c23e41
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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=lsat+logic+games+bible+workbook+pdf', likely leads to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The primary intent appears to be directing the user to malicious infrastructure under the guise of providing a study workbook.

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=lsat+logic+games+bible+workbook+pdf
    • http://files.kierstenmodglinauthor.com/uploads/1/3/1/4/131452799/3441632.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/leetcode_meeting_rooms.pdf
    • https://cdn.shopify.com/s/files/1/0437/4642/7034/files/63973363677.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/bruner_theory_of_instruction.pdf
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/right_to_education_article_21a.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/7875560408.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/sharpness_1000_sword_command.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/3457752150.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/51244171979.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/kozina.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_off00005bf5.bin
c4b0108d031e5a73990d1d74c1281c51d6e99263e719680434710808ab7c2aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF5 5712 bytes
font_01_sfnt_off00006f61.bin
2129be3af444ee53f89c035e7bfaacfa5077f76d4b528be0746c6a8958f0c4ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F61 10008 bytes

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