Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9b09d57df585c4…

MALICIOUS

PDF

40.5 KB Created: 2020-08-18 14:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d59682582be24dcbc0bac3b156ae7a8 SHA-1: 0190bc55d347ffd74d9f5ee253ab4008ba087aab SHA-256: 8d9b09d57df585c4dbadcea2e95e213628bdcfb6665c614527d657652b6c359a
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'school magazine cover design free'. This link leads to a URL that is known to host malicious redirector infrastructure. The document also contains a mass external PDF link farm, suggesting an attempt to generate traffic or distribute content through SEO manipulation. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=school+magazine+cover+design+free
    • http://files.scdfcevents.org/uploads/1/3/2/8/132814086/1947001.pdf
    • https://cdn.shopify.com/s/files/1/0434/8067/8557/files/physics_formula_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1371/5606/files/store_keeping_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/shadowing_let_s_speak_japanese.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/44787530003.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/nisutizuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/dukugete.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/78768389442.pdf
    • https://cdn.shopify.com/s/files/1/0430/8729/8714/files/togupitezabege.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/789613773.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_off00005fd8.bin
06af8ea8b7dad0b124711bcfb5814473e07c50fa9faaceb9b0cd09303f97a2f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD8 5648 bytes
font_01_sfnt_off000072ea.bin
e9bda773bc34d139a5b437cdcdb46c11685ef9bad4d91de0dbf5de40d0ee6d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72EA 10160 bytes

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