Malicious PDF — malware analysis report

Static analysis result for SHA-256 a690b7dc33ea4150…

MALICIOUS

PDF

42.8 KB Created: 2020-08-20 21:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96a70bb0b6fbcc5761a44e3c2fc08d43 SHA-1: bec88bdf4a659cce634061874c7434eb6326874a SHA-256: a690b7dc33ea41501f06514925908c90d78941eb67afb84c867929cf5e183d0a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. One of the primary links directs to 'ttraff.ru', a known malicious domain. The document body, though heavily corrupted, contains text related to 'partnership business pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of many Shopify-hosted PDF links, while mostly benign, likely serves to obscure the malicious intent and potentially improve SEO for the malicious redirector.

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.ru/pify?keyword=characteristics+of+partnership+business+pdf
    • http://vimalomu.ipa-ok.com/uploads/1/3/0/7/130740074/721c700465db.pdf
    • https://cdn.shopify.com/s/files/1/0448/2108/6365/files/rachmaninoff_vespers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/labogibijewopugebupik.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4567/files/jammu_live_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/2121/3591/files/72424201185.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/mivuzosolirebexewogewode.pdf
    • https://cdn.shopify.com/s/files/1/0434/6531/0373/files/74794458324.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/68308777965.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/maths_reference_books_for_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/fukulobugemub.pdf
    • https://cdn.shopify.com/s/files/1/0433/3086/3259/files/87143568795.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/new_wave_cooker.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/africa_in_world_history.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/27594751833.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/ansible_test_template.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_off000069a7.bin
c888f17bd332ccff197058cf973e466954dd49f29bdb540c8d36f4c61e4d646f
pdf-font-stream PDF embedded font (sfnt) at offset 0x69A7 5256 bytes
font_01_sfnt_off00007b71.bin
a92e612cffc07bd98d53abded85a036eb92a5a1569e9b4516e65d559a5d5d18a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B71 10120 bytes