Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8880388fa0d6c3…

MALICIOUS

PDF

60.8 KB Created: 2020-07-29 15:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70ef918a8a94edf6474c6c44b4c3fc56 SHA-1: e82c2c24074f84998322efb81492a072c6305fd6 SHA-256: 9e8880388fa0d6c374343b785f46efa77ba684830540f1e6c70255ff6efb6b0a
128 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also exhibits characteristics of a link farm, with numerous external PDF links, as indicated by PDF_SEO_LINK_FARM. The presence of a visual download button lure (SE_DOWNLOAD_BUTTON) further supports the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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=bihar+police+syllabus+2020+pdf+in+english
    • http://files.erinjreifler.com/uploads/1/3/1/4/131437532/4a734d43.pdf
    • http://files.kidstopinc.com/uploads/1/3/1/3/131398244/6571ec322d2.pdf
    • http://files.widenelementary.org/uploads/1/3/1/8/131871852/wumenanawusom.pdf
    • http://csbc.bih.nic.in
    • http://files.kidstopinc.com/
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/gixezurutinajujofimexoluj.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/49377546924.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/21715406646.pdf
    • https://cdn.shopify.com/s/files/1/0432/7145/4883/files/dekixenivabadomataxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/90189253062.pdf
    • https://cdn.shopify.com/s/files/1/0431/0509/1745/files/13287652620.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/19180570364.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/tajejizitil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6427/0743/files/51231511719.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/lorojizekim.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/77330631678.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/34564446030.pdf
    • https://cdn.shopify.com/s/files/1/0432/1463/5165/files/19547829850.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009418.bin
4ecc41bca83c815c4ea31683b1dc69f2358ea0f91c4225d2e1cfec18d02da21f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9418 5784 bytes
font_01_sfnt_off0000a7b4.bin
bf87cb09c378d5f59d3c191e17f0daeaf1d0ee21618eb40a021f282072d3da7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B4 10700 bytes
font_02_sfnt_off0000cc4d.bin
17fce6ac92c4119087aa2af3eb87f37a9b0919d468a6ff6edbcef410245dbf45
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4D 7576 bytes