Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18d9ed4bfc84a9b…

MALICIOUS

PDF

38.4 KB Created: 2020-08-19 17:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eaa7848c3dc1542b2f2551f70b3d051 SHA-1: aa3e2743f8c5917f294ee25bb8e4bb081207a27b SHA-256: f18d9ed4bfc84a9b22d9a941036dff91f6f0fde9f1396550d8a42e7e0188bc04
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to Shopify domains, but the primary link redirects to a malicious URL. This indicates a link farm or SEO poisoning attack designed to lure users to malicious infrastructure under the guise of providing free educational materials. The primary malicious URL is https://ttraff.com/pify?keyword=preschool+math+worksheets+pdf+free, which is likely used to redirect users to a phishing or malware distribution site.

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=preschool+math+worksheets+pdf+free
    • http://files.deannalorenphotography.com/uploads/1/3/1/0/131070476/4408913.pdf
    • http://files.blacksheepsalonfl.com/uploads/1/3/1/4/131437633/kufiwetulirisesajok.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/fonuxubexazilamarafunew.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7480/files/cd_burner_gratis_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/50805212345.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0469/files/add_and_subtract_fractions_with_unlike_denominators_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/zubasujojasofofu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/lugejewexawibe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/rovufuvepejogadolotemuzim.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_off00005764.bin
ce29e8652858d4b2bd1231de4359f49f857f22f3863c66682bc59a07e477273b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5764 5552 bytes
font_01_sfnt_off00006a2a.bin
07a9913d71887adde3237eeebb0f9b37b0efbe36422d90cbf912f8fa1a3ea0c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 10304 bytes

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