Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8864348eeda4556…

MALICIOUS

PDF

40.0 KB Created: 2020-08-20 01:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77d63fcece16c5c3a9a825cec8101d97 SHA-1: 8ecbbadbd1565d11565102f10486b737aeaabed1 SHA-256: a8864348eeda4556a123443a5a69633b66c25156ec81246d9bfc5e842a571b97
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL found in the heuristic. The primary attack vector appears to be a link farm designed to redirect users to malicious sites, potentially for phishing or malware distribution.

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=3d+pencil+drawing+pictures
    • http://files.elizabethpearlman.com/uploads/1/3/1/3/131378838/9301743.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/10698374035.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/safej.pdf
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/apologetics_study_bible.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/buwexugunojugusudarinope.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/mayo_clinic_cardiology_board_review_questions_and_answers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/xuzitipusu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/basic_income_studies.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/61967105273.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9470/files/48696361354.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_off00005ed5.bin
bb4dfe72c7e8a76d15145c7656e7a39b15343e640a101a3245c15a3060758bc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 5400 bytes
font_01_sfnt_off00007144.bin
ff43a888a8ae08a9d1e4fb11022a994b160f46386cc85b8f400aa1a5a15b907d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7144 10172 bytes

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