Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee31909a1a5251b…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 07:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02ca668833b5c486f00fdbca7b8bc186 SHA-1: ff575b90d4a563d80e9b0948e6ed4d955fde9c80 SHA-256: 9ee31909a1a5251bd304a19a5d4b45607dbb9f0c815bd24ceb996404c3fb1b73
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a download button. The document also hosts a large number of external PDF links, many hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious content. The presence of a call-to-action phrase further supports the lure.

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=business+system+design+document+template
    • http://files.njagc.org/uploads/1/3/1/8/131871583/gowagopamako.pdf
    • http://falade.eibenteaching.com/uploads/1/3/2/6/132682974/dujakubatir-rawemeso-sawula.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/82572174094.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/equivalent_resistance_problems.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/adjective_or_adverb_worksheets_with_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/2343/2861/files/zigode.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/22138592458.pdf
    • https://cdn.shopify.com/s/files/1/0433/7913/0531/files/zend_avesta_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/69448489405.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/27124029568.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/changing_to_word_doc_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/food_sensory_evaluation_form.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_off00005fcd.bin
cacbec1a01bae616c70c77c38028883699be4e0d3ee813684cc4b4ee3a73ae79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 5448 bytes
font_01_sfnt_off00007247.bin
aec65e309dc8bf23320702b3719eb6599cbfc13e35aafaeab354e358877162b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7247 16032 bytes

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