Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf4b019f8701ebd…

MALICIOUS

PDF

40.2 KB Created: 2020-08-31 07:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce5dbbeb0a3d1287b07ec8251d40362b SHA-1: eab6144231ce34a9b69450d1f832db77fcba3927 SHA-256: ebf4b019f8701ebdccee8f1dffa8bda34b86f405a8eb4e04830962b3c106c7c8
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=renaissance+periodization+auto+templ'. It also contains a PDF link farm heuristic, with many links hosted on cdn.shopify.com, one of which is 'https://cdn.shopify.com/s/files/1/0430/7235/6513/files/27309936780.pdf'. The document body contains what appears to be obfuscated text and the malicious URL, suggesting a lure to a malicious site.

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/wix?keyword=renaissance+periodization+auto+templ
    • https://cdn.shopify.com/s/files/1/0430/7235/6513/files/27309936780.pdf
    • https://cdn.shopify.com/s/files/1/0462/6910/4279/files/employment_character_reference_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0460/2216/4639/files/91677989352.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/23076492019.pdf
    • https://cdn.shopify.com/s/files/1/0439/3467/9208/files/synonyms_vocabulary_word_list_for_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9671/files/haproxy_logs_format.pdf
    • https://cdn.shopify.com/s/files/1/0438/5023/6064/files/tozasewawedape.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/dorizajox.pdf
    • https://static.usrfiles.com/ugd/b916f4_5ddb6bb8ce11446090178d83b241e5df.pdf
    • https://static.usrfiles.com/ugd/61804c_74d6b4707957484cadf985562aaddefb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f369167a16424859b507f67f9304f693.pdf
    • https://static.usrfiles.com/ugd/b8c837_0006c9c0d5eb4de4b64eb21d4130d82d.pdf
    • https://static.usrfiles.com/ugd/3aca14_6d8aacaaf1424eb5ad2d5a9a44244286.pdf
    • https://cdn.shopify.com/s/files/1/0457/7224/3110/files/82973575513.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/pruebas_bioquimicas_para_identificacion_de_enterobacterias.pdf
    • https://cdn.shopify.com/s/files/1/0432/2227/0114/files/46045319111.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005222.bin
af9019076969599be7a20b2f243297e11ccf8e4d037f108a250b3b031532a843
pdf-font-stream PDF embedded font (sfnt) at offset 0x5222 5160 bytes
font_01_sfnt_off00006391.bin
7f6d59140cb8a29348fe922d7b7265344fae075b07331adaf6887ef3363c9586
pdf-font-stream PDF embedded font (sfnt) at offset 0x6391 9976 bytes
font_02_sfnt_off000085cb.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x85CB 4324 bytes