Malicious PDF — malware analysis report

Static analysis result for SHA-256 3664884c5d71b457…

MALICIOUS

PDF

41.7 KB Created: 2020-08-16 21:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95d1fac219139df18c082e6eafbd3fc0 SHA-1: df95b8e8e9a7ae26b7857fdad60433f252b7f7e2 SHA-256: 3664884c5d71b4571b4df48f7a0ebba55fe5764a295910e311fd27582cfc1e25
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The document body text, though heavily obfuscated, contains references to 'Mailchimp newsletter template' and a URL that aligns with the malicious redirector. This suggests the document's primary purpose is to trick users into clicking the malicious link, likely leading to a phishing page or malware download.

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=mailchimp+newsletter+template
    • http://files.sub-culture.store/uploads/1/3/0/7/130775448/5984462.pdf
    • http://vegeni.villasincabo.net/uploads/1/3/2/8/132814930/8041395.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/71859626568.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/23622022383.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/applied_mathematics_for_electrical_engineers_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/63629656780.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/90227251197.pdf
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/rabivawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/vegowipagimavep.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/mabubutuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/falipovirajufud.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5713/files/ponatixowonojefezadini.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_off0000647a.bin
622d8ae6f6cc22eb67df1c8ddf6c7f52cb618051485e8ce47e90c7eeb8e4dd34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 5268 bytes
font_01_sfnt_off00007651.bin
ab72e1c9e5f81420f3710dd6847c5612dcbf9e611a48d4866c77b23b393cf650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7651 10524 bytes

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