Malicious PDF — malware analysis report

Static analysis result for SHA-256 9278bd6efd2b85d2…

MALICIOUS

PDF

38.9 KB Created: 2020-08-25 12:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a1d5b0833a61ee4267eda4d3e823aba SHA-1: f2a8cee5f8d7a4cd73143c25538aa60f67a2d0ad SHA-256: 9278bd6efd2b85d28d70cf2117d409aeb531baf875019cca2736a28ceecc6403
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=academy+stars+5+pupil%2527+s+book+pdf'. This indicates a phishing or malware distribution attempt. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, suggesting an attempt to obscure the final malicious destination. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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=academy+stars+5+pupil%2527+s+book+pdf
    • http://files.unityofheartfalmouth.com/uploads/1/3/0/7/130738719/varuvinetuzawonajuge.pdf
    • http://sukikos.walking-in-their-shoes.com/uploads/1/3/1/4/131406062/1981520.pdf
    • http://vusix.familyfunzone.com/uploads/1/3/2/6/132681946/safomona.pdf
    • http://files.theartofkatelynwood.com/uploads/1/3/0/7/130738870/fazuvilelu.pdf
    • http://bimedigod.sandiegosuzukiinstitute.com/uploads/1/3/0/7/130775350/5860941.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/96612612628.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1013/files/kapusuzujorowami.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/biomes_reading_comprehension_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0463/0980/2146/files/20582978282.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/seneschal_dragon_s_dogma.pdf
    • https://cdn.shopify.com/s/files/1/0464/1226/7688/files/converting_measurements_worksheet_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/14351657937.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/36629818415.pdf
    • https://cdn.shopify.com/s/files/1/0430/6062/5562/files/gopegodubasat.pdf
    • https://cdn.shopify.com/s/files/1/0436/8079/2729/files/94935294778.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_off00005647.bin
80773d7f68834ccd69a77be265168f97259fb574ef7afe49904d2c97ca2c3040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5647 5756 bytes
font_01_sfnt_off000069ce.bin
393360e4a7253107b02386e869155d644eba384950863206016e8e3b9b6ae5ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CE 11064 bytes

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