Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7f1a19be335a5b…

MALICIOUS

PDF

62.5 KB Created: 2020-07-21 18:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d19713f50e4f1bfd94c68843915530e SHA-1: 6243ef6ebdbafaf4fc4177f4add97865174164d8 SHA-256: fc7f1a19be335a5b29f821bab9196f59878020ce6b748d6ee89b576c33bba182
128 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a PDF redirector link pointing to ttraff.cc. It also features a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The presence of a visual download button lure further supports the malicious intent of directing users to external, potentially harmful, content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=amu+entrance+exam+papers+pdf
    • http://files.etherealtoneworks.com/uploads/1/3/1/3/131379060/widebu.pdf
    • http://files.bostonbollywood.com/uploads/1/3/1/6/131636866/5805888.pdf
    • http://files.evergreenmeditations.org/uploads/1/3/0/8/130814286/gilazis.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/nuleludibuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/51890170275.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/kuselibeginasaruxemaxuni.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/kurujupusoxo.pdf
    • https://nonepagok.files.wordpress.com/2020/07/89865290219.pdf
    • https://kuretimi.files.wordpress.com/2020/07/gatazuvitusaberadugomam.pdf
    • https://nitapid.files.wordpress.com/2020/06/jomufed.pdf
    • https://gigeseberi.files.wordpress.com/2020/07/gipep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/bopilesumiwiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84407481133.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datufezon.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/gujisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9089/files/jikomerur.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/50510775113.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/36790974936.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/kidevadubo.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085c6.bin
01185ff5430c76a5e41c3b7c7f3be9f632955dd0abdb71836574aed27210f8bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C6 5052 bytes
font_01_sfnt_off000096c6.bin
5c142e21529c3008cd9965c43e0f8c5d3dc883d3fc94227741b9e95ea3527861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C6 5648 bytes
font_02_sfnt_off0000a685.bin
e2d0132d424b74559931c61a6e20b8a9f8a5c486c404ffccba978cb4920a4152		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA685 10480 bytes
font_03_sfnt_off0000ca47.bin
7a7e0f9cb89785dee93ecfbcc78ef93b5a18a5022886c2d5a0bf15d9412c15a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA47 16224 bytes
font_04_sfnt_off0000dfcf.bin
fbd9b62fca5677e227a49b0109ebbdc5cd30f056f4f536da71373314cb9c5343		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCF 2708 bytes

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