Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4136f49d0ac8ff…

MALICIOUS

PDF

41.7 KB Created: 2020-09-01 00:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa9a00d4d5356b8cbceade1ce0698fa9 SHA-1: 75a51622c692458b40a8f597dd965be0968f7158 SHA-256: 1d4136f49d0ac8ff433c22a1a6a22abdc80f3d0ba1b91fe0a2bdfe484791488c
160 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 'https://ttraff.ru/wix?keyword=free++bitlocker+for+mac'. It also exhibits a PDF link farm heuristic, with numerous links to shopify.com domains, suggesting an attempt to obscure the malicious destination. The document body contains text related to 'free bitlocker for mac', likely a lure to entice clicks on the malicious link. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document may be password-protected or instruct the user to open a password-protected archive, a common tactic to bypass gateway scanning.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/wix?keyword=free++bitlocker+for+mac
    • https://cdn.shopify.com/s/files/1/0432/4681/3346/files/egbt-045ms_bluetooth_module.pdf
    • https://cdn.shopify.com/s/files/1/0431/6292/7263/files/deauthorize_callback_url.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/zoxumazot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/traffic_accident_report_perth_wa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/terod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4006/3143/files/breve_historia_del_neoliberalismo_david_harvey.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/24080765080.pdf
    • https://cdn.shopify.com/s/files/1/0461/7699/3434/files/gofalefekebasororesubada.pdf
    • https://cdn.shopify.com/s/files/1/0457/9016/7206/files/58268767969.pdf
    • https://static.usrfiles.com/ugd/10e3af_5fc5006fd9864ee787caaaa71f3b9cd3.pdf
    • https://static.usrfiles.com/ugd/67f5f7_f12565ea10064427bfe50775022fb523.pdf
    • https://static.usrfiles.com/ugd/c0fca2_9942af69b6af41eda72ab523206e699c.pdf
    • https://static.usrfiles.com/ugd/f55bec_931bbf0a273f4da6923293a6fdbc759d.pdf
    • https://static.usrfiles.com/ugd/de3d83_ac49af9eb1314e388eb8da0fa1bce15f.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/83809788288.pdf
    • https://cdn.shopify.com/s/files/1/0433/5812/6245/files/dibivakijerexel.pdf
    • https://cdn.shopify.com/s/files/1/0429/6146/9599/files/nivifaman.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/dalarajoj.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_off000065ab.bin
1e2f3f300a89cdc82fe081aa0351bdfb8d3a0645d10a948cd71afabb22553fa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x65AB 5008 bytes
font_01_sfnt_off000076a8.bin
6514aacefc034385929573ee3c86a7af30d88ded02b2122234341c7281826437
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 10272 bytes