Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58e29c1863d018f…

MALICIOUS

PDF

45.2 KB Created: 2020-08-14 18:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a3e777feee48a4afa406934667f9dec SHA-1: ccadead303811b66306b1963165422fbbf5f365e SHA-256: c58e29c1863d018f2b55442ab696b98ef27d8e0a69524b075ae87c0cf65cd538
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one prominent link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Thanksgiving word problems pdf' and the redirector URL also includes this keyword, suggesting a lure. The presence of numerous PDF links, many pointing to Shopify, indicates a link farm strategy to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer the attack pattern.

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/wb?keyword=thanksgiving%20word%20problems%20pdf
    • http://files.jtygergames.com/uploads/1/3/1/8/131871462/vuvoxi_zudoz.pdf
    • http://fudebilaw.taps2011.com/uploads/1/3/0/7/130775734/3316176.pdf
    • http://files.activatetransformperform.com/uploads/1/3/0/9/130969655/9906056.pdf
    • https://cdn.shopify.com/s/files/1/0447/8897/3729/files/a_level_mathematics_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/anemia_falciforme_genetica.pdf
    • https://cdn.shopify.com/s/files/1/0446/2444/5603/files/lageletogi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/russian_formalist_criticism_four_essays.pdf
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/oops_i_fell_in_love_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/46773381907.pdf
    • https://cdn.shopify.com/s/files/1/0437/8158/7093/files/33291977835.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/49865221229.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/19762820741.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/28388509998.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/5_stages_of_public_policy_process.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikoleluvotejagumali.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/treatment_of_benign_prostatic_hyperplasia.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/ratajorujesisaniveluzogob.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_off00006ae6.bin
5d56b15503d44b95bcbe1e33cb6ed637149c1d414e126239b2dba934f3659da7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE6 5760 bytes
font_01_sfnt_off00007e66.bin
40a5e1b95c1e4a7d3df29622955d75f525be15b2faf0e73afd423a2aad6aab78
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E66 13160 bytes