Malicious PDF — malware analysis report

Static analysis result for SHA-256 be677d04424dc250…

MALICIOUS

PDF

43.7 KB Created: 2020-08-20 23:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f1587f3d65f016c8517658f01005501 SHA-1: 52a78e709b7f74bd547c52737fafa3065d632cb9 SHA-256: be677d04424dc250397dbe56b8d5774189e2c2b3b4b48465820cffa65319852f
128 Risk Score

Malware Insights

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

The PDF contains a lure related to an 'NDA answer key' and includes a critical heuristic firing for a malicious redirector link. It also exhibits a PDF link farm, with many links pointing to Shopify-hosted PDFs. The primary malicious URL identified is ttraff.ru, which is likely used to redirect the user to a further malicious destination. No scripts were extracted, limiting the analysis of the payload.

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.ru/pify?keyword=nda+answer+key++2019
    • http://genodo.working4u2.com/uploads/1/3/2/6/132680813/6fe2e83de3.pdf
    • http://wizemi.focusworksedc.com/uploads/1/3/1/6/131607062/jeponivabiner.pdf
    • https://cdn.shopify.com/s/files/1/0440/8007/0821/files/gotogemoburolunaxewemope.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/aprendizaje_significativo_preescolar.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/deutz_allis_9190.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/26616313264.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/tutidifudeje.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/que_es_holismo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/73165036353.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/83544399880.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/labur.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/guarantee_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1087/files/acquisitions_incorporated_5e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.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_off00006bf8.bin
b67524660e1d092585183b3591e4ab1ed429e762701b7a48bf4bd80ec00ec193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 5496 bytes
font_01_sfnt_off00007ed8.bin
775fb7fb2669b8802292166786838a7143c037e5b0cb94ef095e942cb42cfbab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED8 10404 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.