Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4342e52415a3ee…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 23:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dd00237ba015755e9f224207cfc968d SHA-1: 7bdd22e42092ca60350197329ec9eb5e3bd2cdcd SHA-256: 2b4342e52415a3eec372fcdddb47af764bc5516a9a6595d79987372faba1032c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=openthos+android+os+iso'. This URL is likely used to redirect the user to a malicious site, potentially for phishing or malware delivery. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files, suggesting a coordinated effort to distribute malicious content.

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=openthos+android+os+iso
    • http://files.ohioadolescenthealth.org/uploads/1/3/1/3/131381078/9978064.pdf
    • http://mukam.fscmadison.com/uploads/1/3/0/8/130873998/897f858d55.pdf
    • http://files.leafingthroughbooksandtea.com/uploads/1/3/1/6/131606854/7711173.pdf
    • http://files.coastaldeliinc.com/uploads/1/3/0/7/130739571/radut.pdf
    • http://wurevarog.yez.dk/uploads/1/3/1/6/131637284/84f5813e548b.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/tolifasamizepaxikinek.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/xibalusoxepepewibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/walc_aphasia.pdf
    • https://cdn.shopify.com/s/files/1/0462/7827/9317/files/bestwap_in_2019_movie.pdf
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/data_structure_and_algorithm_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/jokamadipabezaxomesepi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/aesop_rock_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/nilakomonivi.pdf
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/ssc_gd_result_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/28407701037.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_off0000640b.bin
cf7e024cd7d3ff151804614ab0a2b7c7565d057c5e5a569dd5942971559f1228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 5044 bytes
font_01_sfnt_off00007521.bin
bd4b62b63dbc6fd20d5803a80d81d57e275bee1e5bd9c18f6e82333a83f153d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7521 10532 bytes

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