Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57fa6be5e173acb…

MALICIOUS

PDF

46.4 KB Created: 2020-08-12 08:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65e9b8237c6f4f632c1f1a6270c1e63f SHA-1: ecd3b26b7b806f85dbfbc6c162c6758e7f0bdacf SHA-256: b57fa6be5e173acbc050431a67088a96b2dcf9f90dc5eec1a7fadada6abaaa26
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 external links, with one identified as a malicious redirector. The primary heuristic indicates that the document is a link farm designed to distribute malicious content. The presence of the URL 'https://ttraff.ru/pify?keyword=rainforest+animals+list+pdf' strongly suggests an attempt to lure users to a compromised or malicious site.

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=rainforest+animals+list+pdf
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdf
    • http://zozabip.englishappliedlinguistics.com/uploads/1/3/1/3/131383629/9575241.pdf
    • http://files.laurenkorshakmft.com/uploads/1/3/1/3/131380292/jekifubos.pdf
    • http://files.guitarlessonsauckland.com/uploads/1/3/1/3/131380531/zujexidusometajo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/wuzureripejega.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/60139659432.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/aprender_italiano_desde_cero.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1189/files/xubiwurilakurabedabedojiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/76560324759.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/non_clastic_sedimentary_rocks.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/57902672890.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/aflatoxina_b1.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/sopibewoguvulanelezadis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/nivukimu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4326/4411/files/free_firewood_shed_plans.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/91472480811.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/78637583067.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/rusisemuva.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_off000078ca.bin
b58aa2c19f593f313eb1b3de2375a3c8c2342b11ea308955719372b1c1916d9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CA 5196 bytes
font_01_sfnt_off00008a5b.bin
1ffe066150096cff85e69d42fa213671d17af7566a46505a9fb16459a5c21b51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 9908 bytes

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