Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0a4aff10eb90b8…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 09:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30b3364f938f9872cf0cfc5be261d0c3 SHA-1: 10be3100fbe197a09f41f0ce15f52c2870e5cbe5 SHA-256: ab0a4aff10eb90b8840b0af074186ce4c6fba51e078d73e69948362def4afecd
130 Risk Score

Malware Insights

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

The PDF file 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 links to external PDFs hosted on platforms like Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be luring the user to click on the malicious link within the PDF.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ns+crewcall+horse+screen
    • https://webmail.nscorp.com/
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/81944896616.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1821/files/mario_benedetti_no_te_rindas.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/63975041903.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/oxford_ingilizce_hikaye_kitaplar_stage_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0354/files/mokokigezezinawuwujuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/godivunakazopedodo.pdf
    • https://static.usrfiles.com/ugd/d5415a_992da16ab0f64d2daa66ca68c36b3c88.pdf
    • https://static.usrfiles.com/ugd/b5472a_79b53ca22b024d549afb26ae3e8d2436.pdf
    • https://static.usrfiles.com/ugd/2b3f46_7743a0f517304eb380bf5c7df7cb09b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b55a81714a74976b0b84c4e3d273943.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_3d3eda4da9b446f3815b1ba124cfdc56.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2264/files/que_es_auditoria_administrativa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/18819194164.pdf
    • https://cdn.shopify.com/s/files/1/0434/6576/9113/files/vewepo.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_off00006312.bin
81bbd2ecfd69d449ac78613cd80e804a72e2d0388599ee400fcb5b476700e39c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 4948 bytes
font_01_sfnt_off000073eb.bin
6698d31a929c4f16c69497fc1fa173d2a1550a2750a5087d66d438d084f1a70d
pdf-font-stream PDF embedded font (sfnt) at offset 0x73EB 10728 bytes