Malicious PDF — malware analysis report

Static analysis result for SHA-256 2490e44bd564c544…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 06:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe4cb827f803c5d87031b7e110fd50bf SHA-1: f4b527df75b846bc0a8d4b41c995b1cf4038cd73 SHA-256: 2490e44bd564c544dc85820d9b5439c57e82a48c9ccc36c311e346492f5d33ce
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The document body contains a call-to-action phrase, suggesting a lure to click the embedded malicious link. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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=sort+worksheets+in+excel+vba
    • http://files.rebeccahousel.com/uploads/1/3/1/4/131454143/bapibironuvelodoje.pdf
    • http://kukuju.bradleywilliamsart.net/uploads/1/3/1/4/131408100/xetadigowul.pdf
    • http://files.midcoastconsult.com/uploads/1/3/1/0/131069763/rewanuxixozo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/8086_microprocessor_assembler_directives.pdf
    • https://cdn.shopify.com/s/files/1/0438/6347/4331/files/calendario_2019_con_festivit_italiane.pdf
    • https://cdn.shopify.com/s/files/1/0439/1406/8123/files/60852800022.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/sedikigasifurobesutamaxud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/ribujevebaxefuwukabezuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/tofokavapugebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/wufuderiwenizowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/5995/files/45951849625.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/83094641626.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1925/files/jetibabef.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6615/files/broiler_chicken_farming_business_plan.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_off00005ea6.bin
8bb96c2e90702d9cb68b9abf761bbc1d24b680ef5ac90877ee81cf5a0c38a3e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA6 5412 bytes
font_01_sfnt_off0000711c.bin
ff6dbae66bdb1617ce7f610405b451ca8a3765cbe74f75d481dac2187f4faf92
pdf-font-stream PDF embedded font (sfnt) at offset 0x711C 10404 bytes