Malicious PDF — malware analysis report

Static analysis result for SHA-256 a364cc2f3d5cddb0…

MALICIOUS

PDF

41.9 KB Created: 2020-08-25 06:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed2e778c9b9252150f60d5355852a6d3 SHA-1: a8c40866738da5f15e05aeb1219daa3226277db6 SHA-256: a364cc2f3d5cddb0ff8738d2db9e4be53203cc6c5348c08097f384dadbfb2978
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=guided+reading+conference+forms+for+teachers. Additionally, the PDF exhibits characteristics of a link farm, with numerous links pointing to external resources, some of which are hosted on potentially compromised Shopify domains. The presence of a visual download button further supports a malicious workflow designed to trick the user into clicking the deceptive links.

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=guided+reading+conference+forms+for+teachers
    • http://gejegeg.r2ricereview.com/uploads/1/3/1/0/131070001/zazilu-ninoruvo-kagil.pdf
    • http://lawixafo.ikhlastours.co.nz/uploads/1/3/2/3/132303093/9422080.pdf
    • http://files.threecookingsisters.com/uploads/1/3/0/7/130739232/a8425f.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/xeliwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/31870004188.pdf
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/cursors._io_wall_hack.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/bartleby_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/navovifexevezilopavavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/57972929168.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.pdf
    • https://cdn.shopify.com/s/files/1/0436/6280/3097/files/kigijewikimikowufejiviza.pdf
    • https://cdn.shopify.com/s/files/1/0430/6360/7445/files/52538121769.pdf
    • https://cdn.shopify.com/s/files/1/0433/7834/4097/files/character_certificate_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/metiliwetizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8821/6217/files/wixutijikepabu.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_off0000650b.bin
5200ecc73f898f771f552e953ed227f613a8e33e3666fe7f8d20d83c68e8cc87
pdf-font-stream PDF embedded font (sfnt) at offset 0x650B 5432 bytes
font_01_sfnt_off0000775a.bin
c624127177d31b47b1e661489f547be536dec51c1c81a90265fca747efd83cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 10224 bytes