Malicious PDF — malware analysis report

Static analysis result for SHA-256 801eda59bfb564b2…

MALICIOUS

PDF

45.6 KB Created: 2020-07-31 20:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a695796cee468acb830bb5e146245ca6 SHA-1: b21a9426e0f3ef519ad916b3567feb5dd929f831 SHA-256: 801eda59bfb564b28ccc8325792363c7650593bb169a54fa8d01844340799762
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive lure related to installing Hadoop on macOS, directing users to a malicious redirector URL. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the embedded URL confirm the malicious intent. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the target URL and keywords suggesting a social engineering pretext.

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.ru/pify?keyword=install+hadoop+mac
    • http://files.roughsawnlumber.com/uploads/1/3/2/6/132681976/17864bcc40.pdf
    • http://files.trainingaid.co.uk/uploads/1/3/1/4/131410234/suravexomavofedire.pdf
    • http://files.palermiscollection.com/uploads/1/3/1/1/131163740/382a3027.pdf
    • http://files.gracelaneboutique.com/uploads/1/3/0/7/130739835/bigigozumaven.pdf
    • http://files.wildwondersphoto.com/uploads/1/3/1/6/131607063/2217316.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4560/files/91931250837.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/piman.pdf
    • https://cdn.shopify.com/s/files/1/0431/7790/2241/files/kasemuboroxepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4012/files/puzas.pdf
    • https://cdn.shopify.com/s/files/1/0436/1001/3853/files/belifefabiwivati.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/gugidenezegitomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9205/8005/files/nikenuleresinasasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7999/files/65447396584.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/lizupirewuvij.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/ralogano.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/jiguvogubuvejasavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5125/files/3799240308.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_off00006917.bin
65c7d24fbdea808925f67a59c1747605ebd1c9a1a790783b3fd27b14e801b913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 5156 bytes
font_01_sfnt_off00007a79.bin
80070a237b24f40bbafcc010e2de90bce7e22f689e4eccc70310409d20bd5a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 15184 bytes

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