Malicious PDF — malware analysis report

Static analysis result for SHA-256 e766eb4fff92d4db…

MALICIOUS

PDF

49.9 KB Created: 2020-08-09 18:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6490b54d73abf6241e910e3049490cb3 SHA-1: 6b3c15cc768425472ebff867a4ba26001d8281f7 SHA-256: e766eb4fff92d4dbe7b31d156823282bcd940bc1148895c74b441fdf711bb3b1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body text, though partially corrupted, suggests a lure related to a calendar, likely to entice users to click the malicious link. The heuristic firings indicate that the PDF is designed as a redirector link farm, leading to potentially 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=calend%25C3%25A1rio+2020+com+feriados+rio+de+janeiro+pdf
    • http://files.latherrinse.com/uploads/1/3/2/6/132681863/4015169.pdf
    • http://woxirof.emilyafield.com/uploads/1/3/2/7/132712358/midose_xofikeme_nojemi.pdf
    • http://files.thencga.org/uploads/1/3/1/4/131438137/wujagozu.pdf
    • http://nerip.casadeartegallery.com/uploads/1/3/2/8/132814930/newasewonanerajefag.pdf
    • https://cdn.shopify.com/s/files/1/0436/0057/6669/files/boberudilatamejebuviwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/42755846444.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3170/files/singh_vs_kaur.pdf
    • https://cdn.shopify.com/s/files/1/0432/2227/0114/files/design_and_construction_of_automatic_voltage_regulator.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/dojuvavifem.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2646/files/test_for_alkanes_and_alkenes_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/karnataka_election_results_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/mobile_applications_architecture_design_and_development_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/lemebatorir.pdf
    • https://cdn.shopify.com/s/files/1/0437/7526/2869/files/transport_phenomena_in_biological_systems.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0050/files/8235866095.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.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_off00007c83.bin
640770d9c5898a87bdc2a0ee8f33e50253a4d415885d6ba8787b7ae970a8cac2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 5792 bytes
font_01_sfnt_off00008f92.bin
a21ee162c81bc30c215cd8aec7f3b0ce1de27dc8d84148e5d44bf722bb6d8c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F92 13196 bytes