Malicious PDF — malware analysis report

Static analysis result for SHA-256 be52ee1b2a5f9d8c…

MALICIOUS

PDF

39.0 KB Created: 2020-09-01 04:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e38fe912515aa85389295f5de927b51 SHA-1: 0f02eca38af1f689015942fd640b17f94a9492fa SHA-256: be52ee1b2a5f9d8cb5325997d35e80513c8e28d4789776162d0adab4eeb7eb8c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a heuristic identifying it as a PDF link farm. One of the primary links directs to a known malicious redirector at ttraff.ru, suggesting an attempt to lure users to malicious content. The majority of other links point to Shopify-hosted PDFs, likely part of an SEO manipulation scheme to obscure 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/wix?keyword=w+h+c+full+form
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/31809601961.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/xeluladeso.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/mugaji.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/adobe_illustrator_splatter_brushes_free.pdf
    • https://cdn.shopify.com/s/files/1/0441/2263/6440/files/goal_getter_order_card.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/ascites_in_cirrhosis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/animals_coloring_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/4750/0448/files/pepajinezefataro.pdf
    • https://static.usrfiles.com/ugd/90c678_cb0ac88e4fc84f8f8eda94dc57e6c83f.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa28568802844c82bf3acaf25de470f5.pdf
    • https://static.usrfiles.com/ugd/9cb927_0f96c22d4d3a4902870025509131d772.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/kabimufudemekexug.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/cairo_city_map.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_off00005b24.bin
03a1960bb6be0d28106f2ca1eae60083435c6bcf771a2b42a901c4fabda13b5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B24 4748 bytes
font_01_sfnt_off00006b2c.bin
c46aead0e3a889b50b9a84cb4518d94730f64807c5d8ffa578e2bafef2eaf850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2C 10960 bytes

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