Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7c7da86fa71e48…

MALICIOUS

PDF

35.3 KB Created: 2020-08-30 01:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 721947b7900891cab2a922e4c8c0aba4 SHA-1: 69cd401e9fd1e50278d7b5abc6076787c429c523 SHA-256: af7c7da86fa71e485922494afcf03777eae7045cf7c384a74c13af3eb488f726
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO link farms or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.club/wix?keyword=manufacturing+processes+for+engineering+materials+kalpakjian+pdf'. The document body, though heavily obfuscated, contains this URL and other links to PDF files, suggesting a lure to download further content or navigate to malicious sites.

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.club/wix?keyword=manufacturing+processes+for+engineering+materials+kalpakjian+pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/zefavelor.pdf
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/engineering_economy_7th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/biometric_screening_form_anthem.pdf
    • https://static.usrfiles.com/ugd/c12414_0a0218f132e9482cb3c9e0d86d8afb28.pdf
    • https://static.usrfiles.com/ugd/22739b_5b7fb102e5394ea6a5d1435fa9d758d3.pdf
    • https://static.usrfiles.com/ugd/63d3ad_bb7c255434c64f6b96d12e7d72630056.pdf
    • https://static.usrfiles.com/ugd/362633_9405fac327cb4504add54bbaa973af3b.pdf
    • https://static.usrfiles.com/ugd/7baf93_3ac4e514d0fd4ec89599a6aa60bd8b7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5adc04bb8e148e19018b756e5eab315.pdf
    • https://static.usrfiles.com/ugd/b8c837_45efedfe25864268ad47df863318a9b9.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/90920741506.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/56020961200.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/kizigowetutina.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/wotasusefotekuxaxapej.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_off00004b97.bin
2b59d16b50037980e5626fc51fdb79e3b62b5f6b3e1007cc7c9c59f28c7956c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B97 5620 bytes
font_01_sfnt_off00005ea7.bin
3f09ab9f6b174d83f3f897c93aa10b1161ee46bcf10d4074a1a16b291f619d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA7 9732 bytes

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