Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a4764820c955cd…

MALICIOUS

PDF

45.2 KB Created: 2020-08-02 21:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fea6958729093bff0928c4c8565c68d6 SHA-1: a2c066b8978d15a98066dd37f199443fbe1f2572 SHA-256: a5a4764820c955cdd668b14b58c442c82c7880ddba0e8ce2969f27863227bdc0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=aprilaire+700+installation+manual'. This URL is presented within the document body, disguised as an installation manual. The file also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation to attract victims. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

Heuristics 3

  • 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 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=aprilaire+700+installation+manual
    • http://files.ntzmedia.com/uploads/1/3/0/9/130969340/76ec16da12c46.pdf
    • http://bodiful.colettephair.com/uploads/1/3/1/4/131452883/ligobosapaw-dulavativuxa-zikidigorunegev.pdf
    • http://files.cccrw.org/uploads/1/3/2/3/132303138/8c089303b771141.pdf
    • http://files.kingsvalleylabradors.com/uploads/1/3/1/4/131437147/zoxibunug-bekajasuxemuro-jefipop-xakesafejupoxix.pdf
    • http://files.kingsvalleylabradors.com/uploads/1/3/1/4/131437147/zoxibunug-bekajasuxemuro-jefipop-xakesafeju
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/bawinurezegugunarivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/53956214169.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3863/files/14716549593.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/bevikukafe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9027/9574/files/tawekuzalexisajanerawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/wotas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/2001_ford_f150_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/0187/8440/files/norigageruxaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/75465384885.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/lamakudes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/wow_classic_thorium_farming.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/gosilugapuwugulufomumukif.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/eager_loading_sequelize.pdf
    • https://cdn.shopify.com/s/files/1/0436/2980/5726/files/4290664723.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_off00006d18.bin
6f6aa533b393f856a5f053f05aff9da964e606548e2bbd27e98f36e8db1e8088
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D18 5176 bytes
font_01_sfnt_off00007e9f.bin
204ef777ada7d52e1cb0811d35b0fec3a3e00673071735b2c6f5d07325c6594a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9F 12604 bytes