Malicious PDF — malware analysis report

Static analysis result for SHA-256 daeb2ec90eee44c5…

MALICIOUS

PDF

45.2 KB Created: 2020-08-13 21:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9e344f5aef6f0f69b61994af9207043 SHA-1: f27a4cfd379773bf30b7fbb19e85fd8973b5b241 SHA-256: daeb2ec90eee44c5cdd1396294204ebe213001443c15a47320da5a98a9871676
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a critical redirector link pointing to a malicious domain, indicating a phishing or scam attempt. The document body, though obfuscated, contains text related to research citations and a URL that aligns with the redirector heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=importance+of+proper+citation+in+research+report
    • http://files.rug-cutters.de/uploads/1/3/1/1/131163969/1928582.pdf
    • http://files.amerawan.com/uploads/1/3/2/6/132696580/e40f8.pdf
    • http://files.redroselandscaping.com/uploads/1/3/1/3/131380008/6890b4e73c6465c.pdf
    • http://files.shannonvilledrags.com/uploads/1/3/1/3/131381288/kowelobuwis.pdf
    • http://files.artsandengagement.co.uk/uploads/1/3/0/9/130969046/7265325.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/72262861920.pdf
    • https://cdn.shopify.com/s/files/1/0434/3001/9229/files/bifewup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/gunezogaposu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/gezisikofobumowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/alleluia_canon_mozart.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/9898064454.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/goxugakajunewew.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/wumikilepezetupujilepunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/bluedio_f2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/59026953191.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_off000070ca.bin
217a3fd7ac19088b063b68065cd130a3df8400d50ff2f01ebedd9ea3c654e186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CA 5160 bytes
font_01_sfnt_off00008220.bin
082a6f82b6d936719896ff2b376d722f56dde49eac6ba0b757e23a7a8e402326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8220 11108 bytes

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