Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fccb42886e595d…

MALICIOUS

PDF

39.3 KB Created: 2020-08-17 05:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75a00e0bdadcc84f8e1816caaf01a012 SHA-1: 706eb9d4d7ad54b73cee93a9736db4c1bb59d0d4 SHA-256: d1fccb42886e595d5f6963a795e2c21be9678b0fc1b2d5c6eb30c4f21ab0dfdf
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with a critical heuristic identifying it as a PDF link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=accounts+receivable+balance+sheet+presentation', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to financial presentations, suggesting a lure to entice users to click the malicious link. The presence of multiple Shopify links, while some are confirmed benign, indicates an attempt to obscure the malicious destination among seemingly legitimate ones.

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=accounts+receivable+balance+sheet+presentation
    • http://files.colovantage.com.au/uploads/1/3/1/1/131163747/2397850.pdf
    • http://files.rivalgates.com/uploads/1/3/0/7/130739204/452accfd156.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/97904978.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27055139941.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/convert_large_file_to_word_document_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/gimugiwidosusewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2119/files/zojiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/13550953713.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1715/files/aluminium_cladding_details.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/fovafobelule.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6411/files/2003_mitsubishi_eclipse_spyder_gts.pdf
    • https://cdn.shopify.com/s/files/1/0431/7164/3554/files/50083164987.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_off00005cdc.bin
7f18741e4811d531e0da63604ca5659b2d09d9a179dbf521fa63e39b2f7c0518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 5208 bytes
font_01_sfnt_off00006e85.bin
1c6e490ff19b812c12d152960bf27b679751e007fff4ac6397a20bf8d5e78309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E85 9948 bytes

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