Malicious PDF — malware analysis report

Static analysis result for SHA-256 9279dfdefce239eb…

MALICIOUS

PDF

39.6 KB Created: 2020-08-25 09:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0d0dfbeae94f3b82ed048f535258363 SHA-1: f2cf2b3abcdf0a1e9f5c492ca839862634c1c452 SHA-256: 9279dfdefce239ebccb4e4559755785606675e039f007e042740d66064ad5d5c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a deceptive document body masquerading as an educational worksheet, which is a common lure for phishing attacks. It embeds numerous links, including a critical redirector link to 'ttraff.cc', indicating an attempt to lead the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of a malicious redirector and a link farm suggests a phishing or malware distribution attempt.

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=capitalization+worksheet+2nd+grade
    • http://files.adkstrings.com/uploads/1/3/2/6/132681452/6cae49c564e4e82.pdf
    • http://mamuz.angelakleis.com/uploads/1/3/2/6/132681862/02779c.pdf
    • http://files.myownmarketingcoach.com/uploads/1/3/0/7/130775970/gefumizimojowof.pdf
    • http://files.kcbourbonandwhiskeyclub.com/uploads/1/3/0/7/130739116/zurul_niwimomun.pdf
    • http://files.redriverretentionauthority.net/uploads/1/3/0/7/130776712/xukulimoguxal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/90555328601.pdf
    • https://cdn.shopify.com/s/files/1/0452/2462/4288/files/519664123.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/bertie_botts_every_flavor_beans_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/1485/5583/files/87375297909.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/gitanolivepi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/sepuzufaxinafelu.pdf
    • https://cdn.shopify.com/s/files/1/0439/5221/0088/files/simezaladobetusedire.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9821/files/post_office_ppf_transfer_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1066/files/bwana_u_sehemu_yangu_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2634/files/lobefekojumaf.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_off00005be6.bin
12a16b8760d03423ee94695a6a359f6b03afca6f9aec815e2be477cb2c6b7dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE6 5464 bytes
font_01_sfnt_off00006e8f.bin
675f6ed4d463070f3f4868d304bde445ad45b6038c0ea061b438bac4ed03b88b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8F 10260 bytes

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