Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5aa275f0f9dd417…

MALICIOUS

PDF

48.1 KB Created: 2020-08-20 13:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 919c02233146b4e9072c4cd98f395382 SHA-1: 4d32fafad519c38f61843090193f5d478eadd72a SHA-256: d5aa275f0f9dd417dc8fb2da20b5823c9703934c810a681b34573d00fce618a3
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, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the same redirector URL and references educational material, indicating a lure to disguise the malicious intent. The primary goal appears to be redirecting the user to malicious infrastructure.

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=geometry+practice+problems+and+answers
    • http://files.chaamrealty.net/uploads/1/3/1/3/131382696/26360.pdf
    • https://cdn.shopify.com/s/files/1/0448/0958/4802/files/cover_up_method_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/vepupesawoxanu.pdf
    • https://cdn.shopify.com/s/files/1/0454/3024/3484/files/sample_worksheets_on_ordinal_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/25350876363.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/29349167021.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/79976429111.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9170/files/jikubawikujalafen.pdf
    • https://cdn.shopify.com/s/files/1/0432/4379/8683/files/the_ripple_effect_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/12051743197.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/fisioterapia_cancer_de_pulmo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f8.bin
8a313ae11eadfac19f77c7a30678cd9bf7eb742ceea74af4f045466e1742f5d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F8 5584 bytes
font_01_sfnt_off00007aed.bin
8ccde6baa4c61228f6ed701b01526b0e671d54fa96561e93492b975560a5a5e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AED 10440 bytes
font_02_sfnt_off00009ed5.bin
24c5c481937acf4f4841e6563a6d7a18cfdb810806c94b09ac0ff4033348c1e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED5 16072 bytes

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