Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54eff4dc83ddb36…

MALICIOUS

PDF

40.5 KB Created: 2020-08-05 03:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 828ac78f22bab2bc6a8c71a66dedaefa SHA-1: 44356306d8ac703a812a7e48c941b8940be47996 SHA-256: a54eff4dc83ddb368796c3e1989941a708d035513b9ffa4180bf4a0acdad1536
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=cambridge+medical+english+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on shopify.com, likely to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=cambridge+medical+english+pdf
    • http://fodala.agratefulnote.com/uploads/1/3/0/7/130738614/ketixuboxi_tasora.pdf
    • http://files.emilyeaglin.com/uploads/1/3/1/4/131438397/3e79e7.pdf
    • http://files.sanfordfilmfest.com/uploads/1/3/0/8/130813768/2894551.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/soranavosu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/vigusoxifobuletujoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/vapuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/chapter_3_lexical_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5000/0791/files/42987615854.pdf
    • https://cdn.shopify.com/s/files/1/0428/5094/3142/files/81438074458.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/kitchenaid_artisan_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/37139759437.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3420/files/xopulagoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/pebopaduzip.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4815/files/nikagojazavo.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_off00005f26.bin
d055a3a46a83bc71cffd397a212a51606a72ca542391c09a2b0d1c3105f84048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F26 5612 bytes
font_01_sfnt_off00007204.bin
1a8d73d5a4098f0745461b01a4e786c4b4b0c6df83fce9f968738324487caf37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7204 10232 bytes

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