Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00d0d37313ce4a2…

MALICIOUS

PDF

56.5 KB Created: 2020-07-08 22:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e99270438ed73510b768702df52fe4e6 SHA-1: ab836dd38d9ea53519278f209592b2513ca1f946 SHA-256: a00d0d37313ce4a20187c29e327fcbc8d616b1b6e9ed716cd1b36e6205db66a6
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious URL identified is https://ttraff.cc/wb?keyword=advances%20in%20modeling%20agricultural%20systems%20pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to academic papers and the tool used to generate the PDF, suggesting a lure to disguise the malicious links. The ML classifier strongly indicates maliciousness.

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.cc/wb?keyword=advances%20in%20modeling%20agricultural%20systems%20pdf
    • http://files.pasifikabusinessnetwork.com/uploads/1/3/1/4/131454581/munapaja.pdf
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdf
    • http://files.spamitzvah.com/uploads/1/3/1/3/131384789/2268709.pdf
    • http://files.amandamarkle.com/uploads/1/3/1/4/131437778/zagipugebeguvokaxo.pdf
    • http://files.2878music.com/uploads/1/3/1/1/131164252/90068c65dd1d4f2.pdf
    • http://files.godswaytshirts.com/uploads/1/3/2/3/132302815/7c24d7928c8eda5.pdf
    • http://files.commentingtogether.com/uploads/1/3/1/8/131871778/duzijonuv.pdf
    • http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdf
    • http://files.mairibudreau.com/uploads/1/3/0/7/130776864/ziwawajobigogefivane.pdf
    • http://files.clevelandcountyhistoricalsociety.com/uploads/1/3/2/8/132815752/sobuju-rerilujefemimed-nejasakegefub.pdf
    • https://mawumobu.files.wordpress.com/2020/07/40953612340.pdf
    • https://gejovofusasa.files.wordpress.com/2020/07/venewamatimuz.pdf
    • https://fatiwasorug.files.wordpress.com/2020/06/74137837587.pdf
    • https://newomigefixe.files.wordpress.com/2020/06/poduzuzeruvofun.pdf
    • https://bijufexabez.files.wordpress.com/2020/06/nukemebebamuburedapa.pdf
    • https://zalusuzet.files.wordpress.com/2020/06/numevejinog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.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_off00009e25.bin
5b32c65ea5bc76529a9e62da64bf018a71d3fc4f9df5c9ddb9f653464e3311c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E25 5508 bytes
font_01_sfnt_off0000b0d4.bin
3bc9f91c6dd35dc348e67cfc318916a7a4f1a8e612ca3863ab5786664767d69c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D4 10468 bytes

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