Malicious PDF — malware analysis report

Static analysis result for SHA-256 31adeb9545a836cd…

MALICIOUS

PDF

71.2 KB Created: 2020-07-10 01:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1683297aea5e3ccfe6b65a5a9892fc55 SHA-1: 544717b120de602ea1f7950d37eba19ecfcd10db SHA-256: 31adeb9545a836cdd263aa981c2946ef29f4fb797a09c0b07360f106f989a3a1
152 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for SEO spam and phishing campaigns. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body, though partially corrupted, contains keywords related to 'Oracle enterprise performance management' and a URL that appears to be part of a link farm designed to manipulate search engine results. The presence of many external PDF links suggests an attempt to distribute malicious content or drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=oracle%20enterprise%20performance%20management%20pdf
    • http://files.brambleithaca.com/uploads/1/3/1/4/131482937/lopakuzunudomij.pdf
    • http://files.confetticakeshop.com/uploads/1/3/2/6/132681356/4635219.pdf
    • http://files.gaindetalks.com/uploads/1/3/0/8/130874629/dojoja-kefuzegomoli-wadab.pdf
    • http://files.joeyktattoos.com/uploads/1/3/1/0/131070098/9644129.pdf
    • http://files.tripadvicepersonalised.com/uploads/1/3/0/9/130969876/xozuwamugexabikum.pdf
    • http://files.toledoia.com/uploads/1/3/1/4/131407665/kimuxagarebiluvox.pdf
    • http://files.christophertstout.com/uploads/1/3/0/8/130874352/javeg.pdf
    • http://files.annabelleventer.com/uploads/1/3/2/6/132681970/lozefim.pdf
    • http://files.bearheartbottomsetc.com/uploads/1/3/0/9/130969628/fewuga.pdf
    • http://files.bilgerdesign.net/uploads/1/3/1/3/131398177/mibixalilixixe_jaxaberowe_lurivemew.pdf
    • http://files.maggiemoris.com/uploads/1/3/1/4/131438500/zivuwewetazu.pdf
    • http://files.bilgerdesign.net/uploads/1/3/
    • https://waluvemoxus.files.wordpress.com/2020/06/sizedurejuxezeno.pdf
    • https://nisawutuvava.files.wordpress.com/2020/06/lotipanubu.pdf
    • https://rolinozopuj.files.wordpress.com/2020/06/19788995436.pdf
    • https://vigazot.files.wordpress.com/2020/06/54575481839.pdf
    • https://sikexuwaj.files.wordpress.com/2020/07/wutavajafusezobiseni.pdf
    • https://dukidowa.files.wordpress.com/2020/06/kisezijelilobesivelomuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.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_off0000d49d.bin
883d3f3f0dc3c673119fa8c0ec04bffb9f090354ca1edb35d86764bcd91477bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD49D 5292 bytes
font_01_sfnt_off0000e679.bin
4bb72986f98ebbde0edc65dd730d8561d6e51e6696f2d27fc047cba695f31f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE679 13132 bytes

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