Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b64797eab795ed…

MALICIOUS

PDF

42.3 KB Created: 2020-08-06 13:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0be629e79b726c4042ff520cfc5faab SHA-1: 69ec4d82566bb2ea3ecff85fe9e0cf46ad9b8752 SHA-256: 99b64797eab795ed389ff6a15e4b5a462ea18882c33a63b40f19e40096d77d4f
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a common technique for SEO manipulation or distributing malicious content. One of the embedded links, 'https://ttraff.cc/pify?keyword=b.+com+2nd+year+books+pdf', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

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=b.+com+2nd+year+books+pdf
    • http://files.jwhitneyart.com/uploads/1/3/2/3/132303151/jixuzizew_zofupefopusut_rujodeg.pdf
    • http://files.emmausbaseball.com/uploads/1/3/1/3/131397971/wevudizuseke.pdf
    • http://files.crossroadsbrooklyn.com/uploads/1/3/1/4/131412858/mazanufenefapakaga.pdf
    • http://xofawe.starrglasscreations.com/uploads/1/3/1/4/131453177/96cbfa1f13dd63.pdf
    • https://cdn.shopify.com/s/files/1/0435/8917/3411/files/arteria_carotida_anatomia.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4415/files/63599203268.pdf
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/array_reduce_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/7716054187.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/tabadawewubevox.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3973/files/33449739475.pdf
    • https://cdn.shopify.com/s/files/1/0433/5088/4505/files/bijojikidelenufafa.pdf
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/cthulhu_r_lyeh_wgah_nagl_fhtagn.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/99901963412.pdf
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/form_5498_turbotax.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/50266293651.pdf
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/58613312873.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_off00006641.bin
30aadc954fbc162f6f7e7c01d5a51e1f0b4914133eb6671bfaf68a50dedf8a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 5788 bytes
font_01_sfnt_off000079f3.bin
cd7cc5a487e7580ab9f50b4db1c3f444dc5ed46ddb5e65d1d8a4e0b89c37bc2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F3 10180 bytes

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