Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73024fdd5ac2244…

MALICIOUS

PDF

42.6 KB Created: 2020-08-23 09:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 447484ced2099bef6b54e9641dca8e62 SHA-1: a48124e03acf1e053c0e4700d59efae5cb9e4ba2 SHA-256: f73024fdd5ac22447cc1936d2204178802baf113e3d9b65188339d99cf942d33
120 Risk Score

Malware Insights

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

The PDF contains a link farm, with multiple embedded URLs pointing to external PDF files. One of these URLs, https://ttraff.ru/pify?keyword=chess+pieces+moves+cheat+sheet, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a lure to a malicious site under the guise of providing useful information.

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=chess+pieces+moves+cheat+sheet
    • http://kunuruku.breedengallery.com/uploads/1/3/2/7/132740829/7213947.pdf
    • http://sijotexun.graceforthebroken.org/uploads/1/3/2/6/132695780/vexemawepogu.pdf
    • https://cdn.shopify.com/s/files/1/0448/1295/9905/files/organelos_de_la_celula_animal_y_sus_funciones.pdf
    • https://cdn.shopify.com/s/files/1/0438/8339/7275/files/74944199707.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1046/files/auditory_discrimination_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/free_ebook_reader_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/77732408033.pdf
    • https://cdn.shopify.com/s/files/1/0440/7453/3014/files/lelozozejetujotajip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/topik_intermediate_vocabulary_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/sogivojutexevixekonir.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/bramman_tamil_audio_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/tinutuvozelezasejesitoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/zabebotoganevozarexobop.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/sanatuzelasekonupikujuj.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_off00006870.bin
1f0cdb360d08c82d453a4fca028cc262d80b974b60506422dd1c8f7e8f0b3f4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6870 5012 bytes
font_01_sfnt_off00007962.bin
63902d851e9c50791d926bb109208db5ea46af98696e2b637bbe809c4d45711b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 10600 bytes

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