Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0358dc4b91f6d7…

MALICIOUS

PDF

33.0 KB Created: 2020-08-01 23:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c1fe3ffc237b07ee15c671e1612cf19 SHA-1: 4740dab4cb14942d71f54ed3176ae7b53a4d0551 SHA-256: eb0358dc4b91f6d7a986154b23b4ff5f1e3cb32e66a029217c4924e1794df4d5
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, with one specifically identified as a malicious redirector. The heuristic firings indicate this is a PDF link farm designed to direct users to potentially harmful content. The document body itself is heavily obfuscated but contains the URL 'https://ttraff.ru/pify?keyword=melodies+from+heaven' which is flagged as a malicious redirector.

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=melodies+from+heaven
    • http://files.malilab.org/uploads/1/3/0/8/130814283/sefasovegizijofe.pdf
    • http://files.bneideffer.net/uploads/1/3/2/6/132695582/845251.pdf
    • http://files.falmouthfloodinsurance.com/uploads/1/3/1/4/131405977/vupatada-wesig.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/69504325092.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/99999806950.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/27980661317.pdf
    • https://cdn.shopify.com/s/files/1/0432/9553/9368/files/kulibive.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/bevomezijikivipok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/89393082812.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/63936266869.pdf
    • https://cdn.shopify.com/s/files/1/0435/2373/5720/files/dakubi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3174/6967/files/35587542215.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/53394758222.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/71353075227.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.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_off0000452e.bin
287e84b252a29caf74c95d6da551ec295f3ac6b8f37a09f08150eb0f1312850c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x452E 5212 bytes
font_01_sfnt_off000056cb.bin
c24d7d880b5af20e754d3cf73381e94139dfb9a4179a5b56d167d6a69c9ba1ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56CB 9480 bytes

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