Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcaa11df17a2b3fd…

MALICIOUS

PDF

46.7 KB Created: 2020-08-19 16:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c3f7d21ef4b79c17ee86fea33647cfb SHA-1: 3d628b124d754da16da9426dcecd8c723f1a8b11 SHA-256: dcaa11df17a2b3fdbf30b2dab276e72b0aa53bd17472bf44ea2cb4b8e96093c8
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 one pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link at 'https://ttraff.ru/pify?keyword=android+sdk+api+level+24' leads to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is part of a link farm, likely to manipulate search engine results or distribute malicious content. The document body contains garbled text and a URL, further supporting the malicious intent.

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=android+sdk+api+level+24
    • http://lijosir.tombarthaexcavating.com/uploads/1/3/1/3/131379174/pafupopavoj.pdf
    • http://bivaju.poetweaver.com/uploads/1/3/0/8/130873995/fe60d0b0.pdf
    • http://zutox.mrssenasclass.com/uploads/1/3/1/4/131453872/9706995.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/70984726311.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4220/files/xemikapowukobofulirixaga.pdf
    • https://cdn.shopify.com/s/files/1/0429/6245/2643/files/robosomubofujigajigerek.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/birezavolizatubamegolokig.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/55387645309.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/jevenogugatu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/jezifamorubotijat.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/79008011891.pdf
    • https://cdn.shopify.com/s/files/1/0440/6280/2070/files/47940318398.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006613.bin
818b2fbeee98145d9bd91a9b4c37e98baa4d4f1c156ae43a980256fee49f1b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6613 4992 bytes
font_01_sfnt_off00007717.bin
4e698631a6809ab353a1bef20dfcc5b9cdc0ce835aa6af6729067d7847a424d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7717 12964 bytes
font_02_sfnt_off00009fe5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE5 4324 bytes

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