Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3855e243da7fbb…

MALICIOUS

PDF

87.3 KB Created: 2020-08-05 08:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55f1a9afa846b9500143f130ffd8fe44 SHA-1: 17dcea800f5dfa18bb8f205097ece6dce0d82add SHA-256: 0c3855e243da7fbb693b1a15b2379c0265e040b5a5fe5c252a71c586021f0f9f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.com/wb?keyword=finding%20nemo%20movie%20script%20pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious content as a movie script. The presence of a malicious redirector and a large number of external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wb?keyword=finding%20nemo%20movie%20script%20pdf
    • http://files.vivalaglamnails.com/uploads/1/3/1/4/131407235/2850621.pdf
    • http://files.nsccfreedomtraining.com/uploads/1/3/0/7/130776245/08114d2b48269c4.pdf
    • http://files.kayakfishing.blog/uploads/1/3/2/6/132682171/8c5ebd1c1716cc5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/nilikonujekes.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3609/files/jilakutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/29368937356.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/genabawuvoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/xegobip.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/rain_bird_esp-_6tm_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/love_dont_change.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/30414417460.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/jabunoxagewutigenezew.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7703/files/95687500679.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/kawugijigusore.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c10.bin
2227ee89b7b1d49be12c6b41866d5ed436921dcd8d5a54b5e3da18298bc4ec7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C10 5248 bytes
font_01_sfnt_off00012deb.bin
23da771081e4d2241a99f7d8035cd30cca3ed7af86d9248bc7bb0217e90c6b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEB 10052 bytes

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