Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf653c4569b63a0…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 19:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3abe04fb5d356cf5bd056ff20dd6674b SHA-1: 45fcfbfab8e34d8f215823816fa170ea0201582e SHA-256: adf653c4569b63a063fa2599da69d60af9ee1f453d4212680f32d80bab05fbf2
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector link pointing to ttraff.ru. The document body, though heavily obfuscated, contains a reference to the same malicious URL. This suggests the PDF is designed to lure users into clicking the link under the guise of downloading practice sheets, leading them to malicious infrastructure.

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.ru/pify?keyword=brush+lettering+printable+practice+sheets
    • http://files.moirajo.com/uploads/1/3/2/7/132710655/6052939.pdf
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/siwenedobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4344/files/xumuripuzolumuxekifit.pdf
    • https://cdn.shopify.com/s/files/1/0438/1874/6013/files/muvufuveke.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/97985263792.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/tesco_job_online_questionnaire_answers_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/redozoviz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2209/7304/files/xaderazegilodobaterepax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/the_celestine_prophecy_full.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/magezolababemigamovozevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/rixowimonurini.pdf
    • https://cdn.shopify.com/s/files/1/0433/9790/6589/files/99158349242.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_off00005af5.bin
083e3367a33b23a4397bb9b484af6f7b5a83b849b34410fbf13ce327d6adbf41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF5 5384 bytes
font_01_sfnt_off00006d34.bin
c7d5e7cf9d39fafa17f81ba420b6d362169bbf2124429c907a57b6f0b099efca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D34 10632 bytes

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