Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e69d85273fb949…

MALICIOUS

PDF

56.9 KB Created: 2020-08-29 11:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48e77061912f5118a05ccc5fce2937d9 SHA-1: 8764ca6582f1feb4c44f375c28c50b0c30ac3f2c SHA-256: b0e69d85273fb9494388ca0dc01e13f551a4f8c1b4d335303f454c4546c3dc88
128 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a critical heuristic firing for a malicious redirector link. The document body, though heavily corrupted, contains text suggesting it is a lure for 'database development for dummies'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/wix?keyword=database+development+for+dummies
    • https://static.usrfiles.com/ugd/b8c837_eaec37f21ff64c6ca47c91c912292bbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_29ffe30b108647d0a3a8c20d0ba16e14.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a48f3dce772440195f05f96363dcfef.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/acer_palmatum_bonsai.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/49119501563.pdf
    • https://cdn.shopify.com/s/files/1/0432/0745/8975/files/27066381170.pdf
    • https://cdn.shopify.com/s/files/1/0437/7709/7886/files/tonibefegolelife.pdf
    • https://cdn.shopify.com/s/files/1/0429/0081/6028/files/freenas_9._2._1._9_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8085/7253/files/99292875250.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/kufonebolubevaginever.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/76160953013.pdf
    • https://static.usrfiles.com/ugd/b8c837_cac386c57616490880203ada5fb27431.pdf
    • https://static.usrfiles.com/ugd/b8c837_6212f1430b58437d84a577fc1e1c08ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b4399643dd941bd8911c7d1ade3219b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f07abd4e94e4775beff56f609c3000f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5eec4bbe028b4a24be489570cf5eb964.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_off0000a0b1.bin
7ff2eca831ccac359212b846ef26da8b30035ec6b0f3c75f944143ca2d196f6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B1 5388 bytes
font_01_sfnt_off0000b2ec.bin
d3257b8e678473c4041220fab147b8aeb775017c70f029ab37343292a35b189e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2EC 10360 bytes