Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91c5e936fa57f36…

MALICIOUS

PDF

43.0 KB Created: 2020-08-15 02:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 847ff5d2646bf10e69e5ab9070575887 SHA-1: 4b4a6e4f7f2f14cd32b3399796bd10ee74df1858 SHA-256: e91c5e936fa57f362f74b4f5632785daead21fe944da680873759788475c9ec5
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 button, intended to lure users to a harmful site. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous embedded links, many pointing to Shopify, suggests a link farm or redirection strategy. The file was generated by wkhtmltopdf, a tool often used to create PDFs from web content, which may explain the embedded URLs.

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.com/pify?keyword=define+conditional+formatting
    • http://files.bbpregistry.com/uploads/1/3/1/3/131398036/busasosu.pdf
    • http://files.hannahmdesign.com.au/uploads/1/3/2/3/132303219/3182323.pdf
    • http://files.chant-elle.com/uploads/1/3/1/3/131379057/45764.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/12796272196.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2954/files/tefefukasipem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/origin_of_bantu_migration.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0604/files/morfologi_bakteri_bacillus_subtilis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/fakubudelo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/91155990480.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/rejaveg.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4741/files/zesifetexuxiwageb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/blackbird_guitar_duet.pdf
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/tolefivifotebezidusilala.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_off00006971.bin
150f12ebddc239e0ffab86320ae7233bfeae90d942ebb0debcf9a7e97f899ffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6971 5164 bytes
font_01_sfnt_off00007ae7.bin
3620a9f836e3c059a4e7a371803e8131ec7668336edb457baa6671398cd02422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE7 10748 bytes

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