Malicious PDF — malware analysis report

Static analysis result for SHA-256 27cf04b504bc50b1…

MALICIOUS

PDF

38.9 KB Created: 2020-08-06 13:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 476eebcfbd6abf021d12790c6ba3f589 SHA-1: 32f11acc3a8134a43f724cecf76ba5f6a7489c16 SHA-256: 27cf04b504bc50b1e13eeaed46d7fe3c7cf17785fee903536cbc34c0bc1e0866
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as educational material, but the primary link redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent. The presence of numerous Shopify links indicates a link farm strategy to obscure the final malicious destination.

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=area+of+triangles+and+parallelograms+worksheet+pdf
    • http://files.otellis-restaurant.com/uploads/1/3/1/8/131857626/luxidowinixit.pdf
    • http://files.missliane.com/uploads/1/3/1/0/131070591/nikoxazenijebip.pdf
    • http://sawupime.darkstarent.com/uploads/1/3/1/4/131482995/zuvawiwefogekiraxafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/41708998752.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1112/files/wazoler.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/5_pointed_star.pdf
    • https://cdn.shopify.com/s/files/1/0433/7188/8803/files/todadepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/rirutexuwigagefegogokiba.pdf
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/it_ebooks_info.pdf
    • https://cdn.shopify.com/s/files/1/0446/7389/2515/files/al_bayan_vol_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/nakujeburez.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/21488152325.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5190/files/vijimixulunowixovame.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2066/files/sigonom.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/43885608391.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_off00005924.bin
7154b7268fb9ea6c0407a333d5e92c46b2b04a3f58a95eaa0a5f45b98df54d49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5924 5600 bytes
font_01_sfnt_off00006c25.bin
3dd72337b82d565559bcc03a06c0dacda2da3718dc9847967c1f7d56ec9fcaa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C25 10076 bytes

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